forked from Minki/linux
6281dcc94a
Create two sets of port member accessors, one set prefixed by fl4_* and the other prefixed by fl6_* This will let us to create AF optimal flow instances. It will work because every context in which we access the ports, we have to be fully aware of which AF the flowi is anyways. Signed-off-by: David S. Miller <davem@davemloft.net>
145 lines
3.1 KiB
C
145 lines
3.1 KiB
C
/*
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*
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* Generic internet FLOW.
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*
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*/
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#ifndef _NET_FLOW_H
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#define _NET_FLOW_H
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#include <linux/in6.h>
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#include <asm/atomic.h>
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struct flowi_common {
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int flowic_oif;
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int flowic_iif;
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__u32 flowic_mark;
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__u8 flowic_tos;
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__u8 flowic_scope;
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__u8 flowic_proto;
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__u8 flowic_flags;
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#define FLOWI_FLAG_ANYSRC 0x01
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#define FLOWI_FLAG_PRECOW_METRICS 0x02
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#define FLOWI_FLAG_CAN_SLEEP 0x04
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__u32 flowic_secid;
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};
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union flowi_uli {
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struct {
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__be16 sport;
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__be16 dport;
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} ports;
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struct {
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__u8 type;
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__u8 code;
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} icmpt;
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struct {
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__le16 sport;
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__le16 dport;
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} dnports;
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__be32 spi;
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__be32 gre_key;
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struct {
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__u8 type;
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} mht;
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};
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struct flowi {
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struct flowi_common __fl_common;
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#define flowi_oif __fl_common.flowic_oif
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#define flowi_iif __fl_common.flowic_iif
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#define flowi_mark __fl_common.flowic_mark
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#define flowi_tos __fl_common.flowic_tos
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#define flowi_scope __fl_common.flowic_scope
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#define flowi_proto __fl_common.flowic_proto
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#define flowi_flags __fl_common.flowic_flags
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#define flowi_secid __fl_common.flowic_secid
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union {
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struct {
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__be32 daddr;
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__be32 saddr;
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} ip4_u;
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struct {
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struct in6_addr daddr;
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struct in6_addr saddr;
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__be32 flowlabel;
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} ip6_u;
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struct {
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__le16 daddr;
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__le16 saddr;
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__u8 scope;
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} dn_u;
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} nl_u;
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#define fld_dst nl_u.dn_u.daddr
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#define fld_src nl_u.dn_u.saddr
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#define fld_scope nl_u.dn_u.scope
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#define fl6_dst nl_u.ip6_u.daddr
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#define fl6_src nl_u.ip6_u.saddr
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#define fl6_flowlabel nl_u.ip6_u.flowlabel
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#define fl4_dst nl_u.ip4_u.daddr
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#define fl4_src nl_u.ip4_u.saddr
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#define fl4_tos flowi_tos
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#define fl4_scope flowi_scope
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union flowi_uli uli_u;
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#define fl4_sport uli_u.ports.sport
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#define fl4_dport uli_u.ports.dport
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#define fl4_icmp_type uli_u.icmpt.type
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#define fl4_icmp_code uli_u.icmpt.code
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#define fl4_ipsec_spi uli_u.spi
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#define fl4_mh_type uli_u.mht.type
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#define fl4_gre_key uli_u.gre_key
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#define fl6_sport uli_u.ports.sport
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#define fl6_dport uli_u.ports.dport
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#define fl6_icmp_type uli_u.icmpt.type
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#define fl6_icmp_code uli_u.icmpt.code
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#define fl6_ipsec_spi uli_u.spi
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#define fl6_mh_type uli_u.mht.type
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#define fl6_gre_key uli_u.gre_key
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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#define FLOW_DIR_IN 0
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#define FLOW_DIR_OUT 1
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#define FLOW_DIR_FWD 2
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struct net;
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struct sock;
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struct flow_cache_ops;
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struct flow_cache_object {
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const struct flow_cache_ops *ops;
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};
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struct flow_cache_ops {
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struct flow_cache_object *(*get)(struct flow_cache_object *);
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int (*check)(struct flow_cache_object *);
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void (*delete)(struct flow_cache_object *);
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};
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typedef struct flow_cache_object *(*flow_resolve_t)(
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struct net *net, const struct flowi *key, u16 family,
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u8 dir, struct flow_cache_object *oldobj, void *ctx);
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extern struct flow_cache_object *flow_cache_lookup(
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struct net *net, const struct flowi *key, u16 family,
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u8 dir, flow_resolve_t resolver, void *ctx);
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extern void flow_cache_flush(void);
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extern atomic_t flow_cache_genid;
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static inline int flow_cache_uli_match(const struct flowi *fl1,
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const struct flowi *fl2)
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{
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return (fl1->flowi_proto == fl2->flowi_proto &&
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!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
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}
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#endif
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