2 * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
3 * (a.k.a. Fault Tolerance or Continuous Replication)
5 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
6 * Copyright (c) 2016 FUJITSU LIMITED
7 * Copyright (c) 2016 Intel Corporation
11 * This work is licensed under the terms of the GNU GPL, version 2 or
12 * later. See the COPYING file in the top-level directory.
15 #ifndef QEMU_COLO_PROXY_H
16 #define QEMU_COLO_PROXY_H
18 #include "slirp/slirp.h"
19 #include "qemu/jhash.h"
20 #include "qemu/timer.h"
22 #define HASHTABLE_MAX_SIZE 16384
25 #define IPPROTO_DCCP 33
29 #define IPPROTO_SCTP 132
32 #ifndef IPPROTO_UDPLITE
33 #define IPPROTO_UDPLITE 136
36 typedef struct Packet {
39 uint8_t *network_header;
42 uint8_t *transport_header;
44 /* Time of packet creation, in wall clock ms */
46 /* Get vnet_hdr_len from filter */
47 uint32_t vnet_hdr_len;
50 typedef struct ConnectionKey {
51 /* (src, dst) must be grouped, in the same way than in IP header */
57 } QEMU_PACKED ConnectionKey;
59 typedef struct Connection {
60 /* connection primary send queue: element type: Packet */
62 /* connection secondary send queue: element type: Packet */
63 GQueue secondary_list;
64 /* flag to enqueue unprocessed_connections */
67 /* offset = secondary_seq - primary_seq */
70 * we use this flag update offset func
71 * run once in independent tcp connection
76 uint32_t connection_key_hash(const void *opaque);
77 int connection_key_equal(const void *opaque1, const void *opaque2);
78 int parse_packet_early(Packet *pkt);
79 void extract_ip_and_port(uint32_t tmp_ports, ConnectionKey *key, Packet *pkt);
80 void fill_connection_key(Packet *pkt, ConnectionKey *key);
81 void reverse_connection_key(ConnectionKey *key);
82 Connection *connection_new(ConnectionKey *key);
83 void connection_destroy(void *opaque);
84 Connection *connection_get(GHashTable *connection_track_table,
87 void connection_hashtable_reset(GHashTable *connection_track_table);
88 Packet *packet_new(const void *data, int size, int vnet_hdr_len);
89 void packet_destroy(void *opaque, void *user_data);
91 #endif /* QEMU_COLO_PROXY_H */