2 libmeshlink.h -- Tincd Library
3 Copyright (C) 2014 Guus Sliepen <guus@tinc-vpn.org> Saverio Proto <zioproto@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 //#include "tincctl.h"
28 extern char *hosts_dir;
29 extern FILE *fopenmask(const char *filename, const char *mode, mode_t perms);
31 extern int check_port(char *name);
33 bool tinc_main_thread(void * in);
35 /* OLD: tinc_configuration_t provides all information required to setup "/etc/tinc"
36 I think tinc_setup() should basically do what cmd_init() from src/tincctl.c does, except it doesn't have to generate a tinc-up script.
38 bool tinc_setup(const char* confbase, const char* name);
40 bool tinc_start(const char* path);
44 typedef struct tincpackethdr {
45 /* Use a standard Type-Length-Value (TLV) element */
48 u_int16_t reserved; /* Always 0 */
49 u_int32_t destination;
51 } __attribute__ ((__packed__)) tincpackethdr;
53 typedef struct tincremotehost {
59 // can be called from any thread
60 bool tinc_send_packet(tincremotehost *receiver, const char* buf, unsigned int len);
62 // handler runs in tinc thread and should return immediately
63 bool tinc_set_packet_receive_handler(void (*handler)(const char* sender, const char* buf, unsigned int len));
66 //It might also be a good idea to add the option of looking up hosts by public
67 //key (fingerprints) instead of names.
69 node_t *tinc_get_host(const char *name);
71 bool tinc_get_hosts(node_t** hosts);
72 //This tinc_host_t is redundant because node_t should be ok
80 unsigned int maxpacketsize;
81 //TODO: anything else?
84 bool tinc_sign(const char* payload, unsigned int len, const char** signature);
86 int tinc_verify(const char* sender, const char* payload, unsigned int plen, const char* signature, unsigned int slen);
89 TODO: It would be good to add a void pointer here that will be passed on to the
90 handler function whenever it is called, or have a void pointer in node_t
91 that can be filled in by the application. That way, you can easily link an
92 application-specific data structure to a node_t.
94 void channel_set_packet_send_handler(int (*handler)(const char* receiver, const char* buf, unsigned int len));
95 void channel_packet_receive_handler(const char* sender, const char* buf, unsigned int len);
97 bool channel_open(const char* partner, void(*read)(int id, const char* buf, unsigned int len), void(*result)(int result, int id));
98 void channel_close(int id);
99 bool channel_write(int id, const char* buf, unsigned int len, void(*result)(int result, int id, unsigned int written));
102 //We do need some more functions. First of all, we need to be able to add nodes
103 //to a VPN. To do that, either an invitation protocol should be used:
105 bool tinc_join_network(const char *invitation);
106 const char *tinc_generate_invitation(const char *name);
109 Or two nodes should exchange some information (their name, address, public
110 key). If the application provides a way to exchange some data with another
114 bool tinc_export(char *buf, size_t *len);
115 node_t *tinc_import(const char *buf, size_t len);
117 Last but not least, some way to get rid of unwanted nodes. Simplest is a
118 function that just blacklists a node.
119 Which should immediately cause the local tincd to ignore any data from that
120 host from that point on. Of course, a somewhat centrally managed,
121 automatically distributed blacklist or whitelist would be the next step.
123 bool tinc_blacklist(node_t *host);