1 #ifndef MESHLINK_CONNECTION_H
2 #define MESHLINK_CONNECTION_H
5 connection.h -- header for connection.c
6 Copyright (C) 2000-2013, 2017 Guus Sliepen <guus@meshlink.io>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 #define OPTION_INDIRECT 0x0001
28 #define OPTION_TCPONLY 0x0002
29 #define OPTION_PMTU_DISCOVERY 0x0004
30 #define OPTION_CLAMP_MSS 0x0008
31 #define OPTION_VERSION(x) ((x) >> 24) /* Top 8 bits are for protocol minor version */
33 typedef struct connection_status_t {
34 unsigned int pinged:1; /* sent ping */
35 unsigned int active:1; /* 1 if active.. */
36 unsigned int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
37 unsigned int unused_termreq:1; /* the termination of this connection was requested */
38 unsigned int remove_unused:1; /* Set to 1 if you want this connection removed */
39 unsigned int timeout_unused:1; /* 1 if gotten timeout */
40 unsigned int unused_encryptout:1; /* 1 if we can encrypt outgoing traffic */
41 unsigned int unused_decryptin:1; /* 1 if we have to decrypt incoming traffic */
42 unsigned int mst:1; /* 1 if this connection is part of a minimum spanning tree */
43 unsigned int control:1; /* 1 if this is a control connection */
44 unsigned int pcap:1; /* 1 if this is a control connection requesting packet capture */
45 unsigned int log:1; /* 1 if this is a control connection requesting log dump */
46 unsigned int invitation:1; /* 1 if this is an invitation */
47 unsigned int invitation_used:1; /* 1 if the invitation has been consumed */
48 unsigned int unused:19;
49 } connection_status_t;
56 typedef struct connection_t {
57 char *name; /* name he claims to have */
59 union sockaddr_t address; /* his real (internet) ip */
60 char *hostname; /* the hostname of its real ip */
61 int protocol_major; /* used protocol */
62 int protocol_minor; /* used protocol */
64 int socket; /* socket used for this connection */
65 uint32_t options; /* options for this connection */
66 connection_status_t status; /* status info */
67 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
69 struct meshlink_handle *mesh; /* the mesh this connection belongs to */
70 struct node_t *node; /* node associated with the other end */
71 struct edge_t *edge; /* edge associated with this connection */
73 ecdsa_t *ecdsa; /* his public ECDSA key */
79 struct buffer_t inbuf;
80 struct buffer_t outbuf;
81 io_t io; /* input/output event on this metadata connection */
82 int tcplen; /* length of incoming TCPpacket */
83 int allow_request; /* defined if there's only one request possible */
85 time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
87 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
90 extern void init_connections(struct meshlink_handle *mesh);
91 extern void exit_connections(struct meshlink_handle *mesh);
92 extern connection_t *new_connection(void) __attribute__((__malloc__));
93 extern void free_connection(connection_t *);
94 extern void connection_add(struct meshlink_handle *mesh, connection_t *);
95 extern void connection_del(struct meshlink_handle *mesh, connection_t *);