edebf579f2
The control socket code was completely different from how meta connections are handled, resulting in lots of extra code to handle requests. Also, not every operating system has UNIX sockets, so we have to resort to another type of sockets or pipes for those anyway. To reduce code duplication and make control sockets work the same on all platforms, we now just connect to the TCP port where tincd is already listening on. To authenticate, the program that wants to control a running tinc daemon must send the contents of a cookie file. The cookie is a random 256 bits number that is regenerated every time tincd starts. The cookie file should only be readable by the same user that can start a tincd. Instead of the binary-ish protocol previously used, we now use an ASCII protocol similar to that of the meta connections, but this can still change.
95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
/*
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node.h -- header for node.c
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Copyright (C) 2001-2009 Guus Sliepen <guus@tinc-vpn.org>,
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2001-2005 Ivo Timmermans
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __TINC_NODE_H__
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#define __TINC_NODE_H__
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#include "splay_tree.h"
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#include "cipher.h"
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#include "connection.h"
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#include "digest.h"
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#include "list.h"
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#include "subnet.h"
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typedef struct node_status_t {
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int unused_active:1; /* 1 if active (not used for nodes) */
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int validkey:1; /* 1 if we currently have a valid key for him */
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int waitingforkey:1; /* 1 if we already sent out a request */
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int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
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int reachable:1; /* 1 if this node is reachable in the graph */
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int indirect:1; /* 1 if this node is not directly reachable by us */
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int unused:26;
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} node_status_t;
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typedef struct node_t {
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char *name; /* name of this node */
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uint32_t options; /* options turned on for this node */
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sockaddr_t address; /* his real (internet) ip to send UDP packets to */
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char *hostname; /* the hostname of its real ip */
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node_status_t status;
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cipher_t incipher; /* Cipher for UDP packets */
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digest_t indigest; /* Digest for UDP packets */
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cipher_t outcipher; /* Cipher for UDP packets */
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digest_t outdigest; /* Digest for UDP packets */
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int incompression; /* Compressionlevel, 0 = no compression */
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int outcompression; /* Compressionlevel, 0 = no compression */
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int distance;
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struct node_t *nexthop; /* nearest node from us to him */
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struct node_t *via; /* next hop for UDP packets */
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splay_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
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splay_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
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struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
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uint32_t sent_seqno; /* Sequence number last sent to this node */
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uint32_t received_seqno; /* Sequence number last received from this node */
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unsigned char late[16]; /* Bitfield marking late packets */
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length_t mtu; /* Maximum size of packets to send to this node */
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length_t minmtu; /* Probed minimum MTU */
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length_t maxmtu; /* Probed maximum MTU */
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int mtuprobes; /* Number of probes */
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struct event mtuevent; /* Probe event */
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} node_t;
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extern struct node_t *myself;
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extern splay_tree_t *node_tree;
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extern splay_tree_t *node_udp_tree;
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extern void init_nodes(void);
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extern void exit_nodes(void);
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extern node_t *new_node(void) __attribute__ ((__malloc__));
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extern void free_node(node_t *);
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extern void node_add(node_t *);
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extern void node_del(node_t *);
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extern node_t *lookup_node(char *);
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extern node_t *lookup_node_udp(const sockaddr_t *);
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extern bool dump_nodes(struct connection_t *);
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extern void update_node_udp(node_t *, const sockaddr_t *);
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#endif /* __TINC_NODE_H__ */
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