194 lines
6.3 KiB
C
194 lines
6.3 KiB
C
/**
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* @file client.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <protocol/scproto.h>
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#include <structure/LinkedList1.h>
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#include <flow/PacketPassFairQueue.h>
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#include <flow/SinglePacketBuffer.h>
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#include <flow/PacketRecvConnector.h>
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#include <client/DatagramPeerIO.h>
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#include <client/StreamPeerIO.h>
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#include <client/DataProto.h>
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#include <client/DPReceive.h>
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#include <client/FrameDecider.h>
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#include <client/PeerChat.h>
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#include <client/SinglePacketSource.h>
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// NOTE: all time values are in milliseconds
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// name of the program
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#define PROGRAM_NAME "client"
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// server output buffer size
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#define SERVER_BUFFER_MIN_PACKETS 200
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// maximum UDP payload size
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#define CLIENT_UDP_MTU 1472
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// maximum number of pending TCP PasswordListener clients
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#define TCP_MAX_PASSWORD_LISTENER_CLIENTS 50
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// maximum number of peers
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#define DEFAULT_MAX_PEERS 256
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// maximum number of peer's MAC addresses to remember
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#define PEER_DEFAULT_MAX_MACS 16
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// maximum number of multicast addresses per peer
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#define PEER_DEFAULT_MAX_GROUPS 16
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// how long we wait for a packet to reach full size before sending it (see FragmentProtoDisassembler latency argument)
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#define PEER_DEFAULT_UDP_FRAGMENTATION_LATENCY 0
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// value related to how much out-of-order input we tolerate (see FragmentProtoAssembler num_frames argument)
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#define PEER_UDP_ASSEMBLER_NUM_FRAMES 4
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// socket send buffer (SO_SNDBUF) for peer TCP connections, <=0 to not set
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#define PEER_DEFAULT_TCP_SOCKET_SNDBUF 1048576
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// keep-alive packet interval for p2p communication
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#define PEER_KEEPALIVE_INTERVAL 10000
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// keep-alive receive timer for p2p communication (after how long to consider the link down)
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#define PEER_KEEPALIVE_RECEIVE_TIMER 22000
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// size of frame send buffer, in number of frames
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#define PEER_DEFAULT_SEND_BUFFER_SIZE 32
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// size of frame send buffer for relayed packets, in number of frames
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#define PEER_DEFAULT_SEND_BUFFER_RELAY_SIZE 32
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// time after an unused relay flow is freed (-1 for never)
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#define PEER_RELAY_FLOW_INACTIVITY_TIME 10000
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// retry time
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#define PEER_RETRY_TIME 5000
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// for how long a peer can send no Membership Reports for a group
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// before the peer and group are disassociated
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#define DEFAULT_IGMP_GROUP_MEMBERSHIP_INTERVAL 260000
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// how long to wait for joins after a Group Specific query has been
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// forwarded to a peer before assuming there are no listeners at the peer
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#define DEFAULT_IGMP_LAST_MEMBER_QUERY_TIME 2000
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// maximum bind addresses
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#define MAX_BIND_ADDRS 8
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// maximum external addresses per bind address
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#define MAX_EXT_ADDRS 8
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// maximum scopes
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#define MAX_SCOPES 8
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//#define SIMULATE_PEER_OUT_OF_BUFFER 70
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struct server_flow {
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PacketPassFairQueueFlow qflow;
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SinglePacketBuffer encoder_buffer;
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PacketRecvConnector connector;
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int connected;
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};
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struct peer_data {
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// peer identifier
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peerid_t id;
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// flags provided by the server
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int flags;
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// certificate reported by the server, defined only if using SSL
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uint8_t cert[SCID_NEWCLIENT_MAX_CERT_LEN];
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int cert_len;
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char *common_name;
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// init job
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BPending job_init;
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// server flow
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struct server_flow *server_flow;
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// chat
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int have_chat;
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PeerChat chat;
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int chat_send_msg_len;
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// resetpeer source (when chat fails)
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int have_resetpeer;
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uint8_t resetpeer_packet[sizeof(struct packetproto_header) + sizeof(struct sc_header) + sizeof(struct sc_client_resetpeer)];
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SinglePacketSource resetpeer_source;
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// local flow
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DataProtoFlow local_dpflow;
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// frame decider peer
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FrameDeciderPeer decider_peer;
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// receive peer
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DPReceivePeer receive_peer;
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// flag if link objects are initialized
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int have_link;
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// receive receiver
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DPReceiveReceiver receive_receiver;
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// transport-specific link objects
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union {
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struct {
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DatagramPeerIO pio;
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uint16_t sendseed_nextid;
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int sendseed_sent;
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uint16_t sendseed_sent_id;
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uint8_t sendseed_sent_key[BENCRYPTION_MAX_KEY_SIZE];
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uint8_t sendseed_sent_iv[BENCRYPTION_MAX_BLOCK_SIZE];
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uint16_t pending_recvseed_id;
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BPending job_send_seed;
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} udp;
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struct {
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StreamPeerIO pio;
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} tcp;
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} pio;
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// link sending
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DataProtoSink send_dp;
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// relaying objects
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struct peer_data *relaying_peer; // peer through which we are relaying, or NULL
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LinkedList1Node relaying_list_node; // node in relay peer's relay_users
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// waiting for relay data
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int waiting_relay;
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LinkedList1Node waiting_relay_list_node;
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// retry timer
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BTimer reset_timer;
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// relay server specific
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int is_relay;
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LinkedList1Node relay_list_node;
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LinkedList1 relay_users;
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// binding state
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int binding;
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int binding_addrpos;
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// peers linked list node
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LinkedList1Node list_node;
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};
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