/*
net_setup.c -- Setup.
- Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
- 2006 Scott Lamb <slamb@slamb.org>
- 2010 Brandon Black <blblack@gmail.com>
+ Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include "cipher.h"
#include "conf.h"
#include "connection.h"
-#include "control.h"
-#include "device.h"
-#include "digest.h"
#include "ecdsa.h"
#include "graph.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "net.h"
#include "netutl.h"
-#include "process.h"
#include "protocol.h"
#include "route.h"
-#include "rsa.h"
-#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
+#include "submesh.h"
-char *myport;
-static struct event device_ev;
-devops_t devops;
-
-char *proxyhost;
-char *proxyport;
-char *proxyuser;
-char *proxypass;
-proxytype_t proxytype;
-int autoconnect;
-
-char *scriptinterpreter;
-char *scriptextension;
-
-bool node_read_ecdsa_public_key(node_t *n) {
- if(ecdsa_active(&n->ecdsa))
+bool node_read_ecdsa_public_key(meshlink_handle_t *mesh, node_t *n) {
+ if(ecdsa_active(n->ecdsa)) {
return true;
+ }
splay_tree_t *config_tree;
- FILE *fp;
- char *pubname = NULL, *hcfname = NULL;
char *p;
- bool result = false;
-
- xasprintf(&hcfname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
init_configuration(&config_tree);
- if(!read_config_file(config_tree, hcfname))
+
+ if(!read_host_config(mesh, config_tree, n->name)) {
goto exit;
+ }
/* First, check for simple ECDSAPublicKey statement */
if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
- result = ecdsa_set_base64_public_key(&n->ecdsa, p);
+ n->ecdsa = ecdsa_set_base64_public_key(p);
free(p);
- goto exit;
- }
-
- /* Else, check for ECDSAPublicKeyFile statement and read it */
-
- if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &pubname))
- xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
-
- fp = fopen(pubname, "r");
-
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", pubname, strerror(errno));
- goto exit;
}
- result = ecdsa_read_pem_public_key(&n->ecdsa, fp);
- fclose(fp);
-
exit:
exit_configuration(&config_tree);
- free(hcfname);
- free(pubname);
- return result;
+ return n->ecdsa;
}
-bool read_ecdsa_public_key(connection_t *c) {
- FILE *fp;
- char *fname;
+bool read_ecdsa_public_key(meshlink_handle_t *mesh, connection_t *c) {
+ if(ecdsa_active(c->ecdsa)) {
+ return true;
+ }
+
char *p;
- bool result;
+
+ if(!c->config_tree) {
+ init_configuration(&c->config_tree);
+
+ if(!read_host_config(mesh, c->config_tree, c->name)) {
+ return false;
+ }
+ }
/* First, check for simple ECDSAPublicKey statement */
if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
- result = ecdsa_set_base64_public_key(&c->ecdsa, p);
+ c->ecdsa = ecdsa_set_base64_public_key(p);
free(p);
- return result;
+ return c->ecdsa;
}
- /* Else, check for ECDSAPublicKeyFile statement and read it */
+ return false;
+}
- if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname))
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
+bool read_ecdsa_private_key(meshlink_handle_t *mesh) {
+ FILE *fp;
+ char filename[PATH_MAX];
- fp = fopen(fname, "r");
+ snprintf(filename, PATH_MAX, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
+ fp = fopen(filename, "rb");
if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s",
- fname, strerror(errno));
- free(fname);
+ logger(mesh, MESHLINK_ERROR, "Error reading ECDSA private key file: %s", strerror(errno));
return false;
}
- result = ecdsa_read_pem_public_key(&c->ecdsa, fp);
+ mesh->self->connection->ecdsa = ecdsa_read_pem_private_key(fp);
fclose(fp);
- if(!result)
- logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname);
- free(fname);
- return result;
+ if(!mesh->self->connection->ecdsa) {
+ logger(mesh, MESHLINK_ERROR, "Reading ECDSA private key file failed: %s", strerror(errno));
+ }
+
+ return mesh->self->connection->ecdsa;
}
-bool read_rsa_public_key(connection_t *c) {
+static bool read_invitation_key(meshlink_handle_t *mesh) {
FILE *fp;
- char *fname;
- char *n;
- bool result;
+ char filename[PATH_MAX];
- /* First, check for simple PublicKey statement */
-
- if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
- result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
- free(n);
- return result;
+ if(mesh->invitation_key) {
+ ecdsa_free(mesh->invitation_key);
+ mesh->invitation_key = NULL;
}
- /* Else, check for PublicKeyFile statement and read it */
+ snprintf(filename, PATH_MAX, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
- if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
+ fp = fopen(filename, "rb");
- fp = fopen(fname, "r");
+ if(fp) {
+ mesh->invitation_key = ecdsa_read_pem_private_key(fp);
+ fclose(fp);
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
- free(fname);
- return false;
+ if(!mesh->invitation_key) {
+ logger(mesh, MESHLINK_ERROR, "Reading ECDSA private key file `%s' failed: %s", filename, strerror(errno));
+ }
}
- result = rsa_read_pem_public_key(&c->rsa, fp);
- fclose(fp);
-
- if(!result)
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
- free(fname);
- return result;
+ return mesh->invitation_key;
}
-static bool read_ecdsa_private_key(void) {
- FILE *fp;
- char *fname;
- bool result;
-
- /* Check for PrivateKeyFile statement and read it */
+bool node_read_devclass(meshlink_handle_t *mesh, node_t *n) {
- if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname))
- xasprintf(&fname, "%s" SLASH "ecdsa_key.priv", confbase);
+ splay_tree_t *config_tree;
+ char *p;
- fp = fopen(fname, "r");
+ init_configuration(&config_tree);
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
- free(fname);
- return false;
+ if(!read_host_config(mesh, config_tree, n->name)) {
+ goto exit;
}
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- struct stat s;
-
- if(fstat(fileno(fp), &s)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno));
- free(fname);
- return false;
+ if(get_config_string(lookup_config(config_tree, "DeviceClass"), &p)) {
+ n->devclass = atoi(p);
+ free(p);
}
- if(s.st_mode & ~0100700)
- logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname);
-#endif
-
- result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp);
- fclose(fp);
+ if((int)n->devclass < 0 || n->devclass > _DEV_CLASS_MAX) {
+ n->devclass = _DEV_CLASS_MAX;
+ }
- if(!result)
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
- free(fname);
- return result;
+exit:
+ exit_configuration(&config_tree);
+ return n->devclass != 0;
}
-static bool read_rsa_private_key(void) {
- FILE *fp;
- char *fname;
- char *n, *d;
- bool result;
+bool node_read_submesh(meshlink_handle_t *mesh, node_t *n) {
- /* First, check for simple PrivateKey statement */
+ splay_tree_t *config_tree;
+ char *p;
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
- if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "PrivateKey used but no PublicKey found!");
- free(d);
- return false;
- }
- result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
- free(n);
- free(d);
- return result;
+ init_configuration(&config_tree);
+
+ if(!read_host_config(mesh, config_tree, n->name)) {
+ goto exit;
}
- /* Else, check for PrivateKeyFile statement and read it */
+ if(get_config_string(lookup_config(config_tree, "SubMesh"), &p)) {
+ n->submesh = NULL;
- if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
- xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase);
+ for list_each(submesh_t, s, mesh->submeshes) {
+ if(!strcmp(p, s->name)) {
+ n->submesh = s;
+ break;
+ }
+ }
- fp = fopen(fname, "r");
+ if(!n->submesh) {
+ n->submesh = (submesh_t *)meshlink_submesh_open(mesh, p);
+ }
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s",
- fname, strerror(errno));
- free(fname);
- return false;
+ free(p);
}
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- struct stat s;
+exit:
+ exit_configuration(&config_tree);
+ return n->submesh != NULL;
+}
+
+bool node_write_devclass(meshlink_handle_t *mesh, node_t *n) {
- if(fstat(fileno(fp), &s)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
- free(fname);
+ if((int)n->devclass < 0 || n->devclass > _DEV_CLASS_MAX) {
return false;
}
- if(s.st_mode & ~0100700)
- logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
-#endif
+ bool result = false;
- result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
- fclose(fp);
+ splay_tree_t *config_tree;
+ init_configuration(&config_tree);
- if(!result)
- logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
- free(fname);
- return result;
-}
+ // ignore read errors; in case the file does not exist we will create it
+ read_host_config(mesh, config_tree, n->name);
-static struct event keyexpire_event;
+ config_t *cnf = lookup_config(config_tree, "DeviceClass");
-static void keyexpire_handler(int fd, short events, void *data) {
- regenerate_key();
-}
+ if(!cnf) {
+ cnf = new_config();
+ cnf->variable = xstrdup("DeviceClass");
+ config_add(config_tree, cnf);
+ }
+
+ set_config_int(cnf, n->devclass);
-void regenerate_key(void) {
- if(timeout_initialized(&keyexpire_event)) {
- logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
- event_del(&keyexpire_event);
- send_key_changed();
- } else {
- timeout_set(&keyexpire_event, keyexpire_handler, NULL);
+ if(!write_host_config(mesh, config_tree, n->name)) {
+ goto fail;
}
- event_add(&keyexpire_event, &(struct timeval){keylifetime, rand() % 100000});
+ result = true;
+
+fail:
+ exit_configuration(&config_tree);
+ return result;
}
-/*
- Read Subnets from all host config files
-*/
-void load_all_subnets(void) {
- DIR *dir;
- struct dirent *ent;
- char *dname;
+bool node_write_submesh(meshlink_handle_t *mesh, node_t *n) {
- xasprintf(&dname, "%s" SLASH "hosts", confbase);
- dir = opendir(dname);
- if(!dir) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
- free(dname);
- return;
+ if(!n->submesh) {
+ return false;
}
- while((ent = readdir(dir))) {
- if(!check_id(ent->d_name))
- continue;
+ bool result = false;
- node_t *n = lookup_node(ent->d_name);
- #ifdef _DIRENT_HAVE_D_TYPE
- //if(ent->d_type != DT_REG)
- // continue;
- #endif
-
- char *fname;
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, ent->d_name);
-
- splay_tree_t *config_tree;
- init_configuration(&config_tree);
- read_config_options(config_tree, ent->d_name);
- read_config_file(config_tree, fname);
- free(fname);
-
- if(!n) {
- n = new_node();
- n->name = xstrdup(ent->d_name);
- node_add(n);
- }
+ splay_tree_t *config_tree;
+ init_configuration(&config_tree);
- for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
- subnet_t *s, *s2;
+ // ignore read errors; in case the file does not exist we will create it
+ read_host_config(mesh, config_tree, n->name);
- if(!get_config_subnet(cfg, &s))
- continue;
+ config_t *cnf = lookup_config(config_tree, "SubMesh");
- if((s2 = lookup_subnet(n, s))) {
- s2->expires = -1;
- } else {
- subnet_add(n, s);
- }
- }
+ if(!cnf) {
+ cnf = new_config();
+ cnf->variable = xstrdup("SubMesh");
+ config_add(config_tree, cnf);
+ }
- exit_configuration(&config_tree);
+ set_config_string(cnf, n->submesh->name);
+
+ if(!write_host_config(mesh, config_tree, n->name)) {
+ goto fail;
}
- closedir(dir);
+ result = true;
+
+fail:
+ exit_configuration(&config_tree);
+ return result;
}
-void load_all_nodes(void) {
+void load_all_nodes(meshlink_handle_t *mesh) {
DIR *dir;
struct dirent *ent;
- char *dname;
+ char dname[PATH_MAX];
- xasprintf(&dname, "%s" SLASH "hosts", confbase);
+ snprintf(dname, PATH_MAX, "%s" SLASH "hosts", mesh->confbase);
dir = opendir(dname);
+
if(!dir) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
- free(dname);
+ logger(mesh, MESHLINK_ERROR, "Could not open %s: %s", dname, strerror(errno));
return;
}
while((ent = readdir(dir))) {
- if(!check_id(ent->d_name))
+ if(!check_id(ent->d_name)) {
continue;
+ }
+
+ node_t *n = lookup_node(mesh, ent->d_name);
+
+ if(n) {
+ if(n == mesh->self && !n->submesh) {
+ node_read_submesh(mesh, n);
+ }
- node_t *n = lookup_node(ent->d_name);
- if(n)
continue;
+ }
n = new_node();
n->name = xstrdup(ent->d_name);
- node_add(n);
+ node_read_devclass(mesh, n);
+ node_read_submesh(mesh, n);
+ node_add(mesh, n);
}
closedir(dir);
}
-char *get_name(void) {
+char *get_name(meshlink_handle_t *mesh) {
char *name = NULL;
- get_config_string(lookup_config(config_tree, "Name"), &name);
+ get_config_string(lookup_config(mesh->config, "Name"), &name);
- if(!name)
+ if(!name) {
return NULL;
-
- if(*name == '$') {
- char *envname = getenv(name + 1);
- if(!envname) {
- if(strcmp(name + 1, "HOST")) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid Name: environment variable %s does not exist\n", name + 1);
- return false;
- }
- char envname[32];
- if(gethostname(envname, 32)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno));
- return false;
- }
- envname[31] = 0;
- }
- free(name);
- name = xstrdup(envname);
- for(char *c = name; *c; c++)
- if(!isalnum(*c))
- *c = '_';
}
if(!check_id(name)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for myself!");
+ logger(mesh, MESHLINK_ERROR, "Invalid name for mesh->self!");
free(name);
- return false;
+ return NULL;
}
return name;
}
-bool setup_myself_reloadable(void) {
- char *proxy = NULL;
- char *rmode = NULL;
- char *fmode = NULL;
- char *bmode = NULL;
- char *afname = NULL;
- char *space;
- bool choice;
-
- free(scriptinterpreter);
- scriptinterpreter = NULL;
- get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
-
-
- free(scriptextension);
- if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension))
-#ifdef HAVE_MINGW
- scriptextension = xstrdup(".bat");
-#else
- scriptextension = xstrdup("");
-#endif
-
- get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
- if(proxy) {
- if((space = strchr(proxy, ' ')))
- *space++ = 0;
+bool setup_myself_reloadable(meshlink_handle_t *mesh) {
+ mesh->localdiscovery = true;
+ keylifetime = 3600; // TODO: check if this can be removed as well
+ mesh->maxtimeout = 900;
+ mesh->self->options |= OPTION_PMTU_DISCOVERY;
- if(!strcasecmp(proxy, "none")) {
- proxytype = PROXY_NONE;
- } else if(!strcasecmp(proxy, "socks4")) {
- proxytype = PROXY_SOCKS4;
- } else if(!strcasecmp(proxy, "socks4a")) {
- proxytype = PROXY_SOCKS4A;
- } else if(!strcasecmp(proxy, "socks5")) {
- proxytype = PROXY_SOCKS5;
- } else if(!strcasecmp(proxy, "http")) {
- proxytype = PROXY_HTTP;
- } else if(!strcasecmp(proxy, "exec")) {
- proxytype = PROXY_EXEC;
- } else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
- return false;
- }
+ read_invitation_key(mesh);
- switch(proxytype) {
- case PROXY_NONE:
- default:
- break;
+ return true;
+}
- case PROXY_EXEC:
- if(!space || !*space) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
- return false;
- }
- proxyhost = xstrdup(space);
- break;
+/*
+ Add listening sockets.
+*/
+static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bindto) {
+ char *port = mesh->myport;
- case PROXY_SOCKS4:
- case PROXY_SOCKS4A:
- case PROXY_SOCKS5:
- case PROXY_HTTP:
- proxyhost = space;
- if(space && (space = strchr(space, ' ')))
- *space++ = 0, proxyport = space;
- if(space && (space = strchr(space, ' ')))
- *space++ = 0, proxyuser = space;
- if(space && (space = strchr(space, ' ')))
- *space++ = 0, proxypass = space;
- if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
- return false;
- }
- proxyhost = xstrdup(proxyhost);
- proxyport = xstrdup(proxyport);
- if(proxyuser && *proxyuser)
- proxyuser = xstrdup(proxyuser);
- if(proxypass && *proxypass)
- proxypass = xstrdup(proxypass);
- break;
+ if(address) {
+ char *space = strchr(address, ' ');
+
+ if(space) {
+ *space++ = 0;
+ port = space;
}
- free(proxy);
+ if(!strcmp(address, "*")) {
+ *address = 0;
+ }
}
- if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
- myself->options |= OPTION_INDIRECT;
+ struct addrinfo *ai;
- if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
- myself->options |= OPTION_TCPONLY;
+ struct addrinfo hint = {
+ .ai_family = addressfamily,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ .ai_flags = AI_PASSIVE,
+ };
- if(myself->options & OPTION_TCPONLY)
- myself->options |= OPTION_INDIRECT;
+ int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
- get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
- get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
+ free(address);
- if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
- if(!strcasecmp(rmode, "router"))
- routing_mode = RMODE_ROUTER;
- else if(!strcasecmp(rmode, "switch"))
- routing_mode = RMODE_SWITCH;
- else if(!strcasecmp(rmode, "hub"))
- routing_mode = RMODE_HUB;
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
- return false;
- }
- free(rmode);
+ if(err || !ai) {
+ logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "getaddrinfo", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err));
+ return false;
}
- if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) {
- if(!strcasecmp(fmode, "off"))
- forwarding_mode = FMODE_OFF;
- else if(!strcasecmp(fmode, "internal"))
- forwarding_mode = FMODE_INTERNAL;
- else if(!strcasecmp(fmode, "kernel"))
- forwarding_mode = FMODE_KERNEL;
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
- return false;
+ bool success = false;
+
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ // Ignore duplicate addresses
+ bool found = false;
+
+ for(int i = 0; i < mesh->listen_sockets; i++)
+ if(!memcmp(&mesh->listen_socket[i].sa, aip->ai_addr, aip->ai_addrlen)) {
+ found = true;
+ break;
+ }
+
+ if(found) {
+ continue;
}
- free(fmode);
- }
- choice = true;
- get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
- if(choice)
- myself->options |= OPTION_PMTU_DISCOVERY;
-
- choice = true;
- get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
- if(choice)
- myself->options |= OPTION_CLAMP_MSS;
-
- get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
- get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
- if(get_config_string(lookup_config(config_tree, "Broadcast"), &bmode)) {
- if(!strcasecmp(bmode, "no"))
- broadcast_mode = BMODE_NONE;
- else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst"))
- broadcast_mode = BMODE_MST;
- else if(!strcasecmp(bmode, "direct"))
- broadcast_mode = BMODE_DIRECT;
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
+ if(mesh->listen_sockets >= MAXSOCKETS) {
+ logger(mesh, MESHLINK_ERROR, "Too many listening sockets");
return false;
}
- free(bmode);
- }
-
-#if !defined(SOL_IP) || !defined(IP_TOS)
- if(priorityinheritance)
- logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
-#endif
- if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
- macexpire = 600;
+ int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
- if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
- if(maxtimeout <= 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Bogus maximum timeout!");
- return false;
+ if(tcp_fd < 0) {
+ continue;
}
- } else
- maxtimeout = 900;
-
- if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
- if(!strcasecmp(afname, "IPv4"))
- addressfamily = AF_INET;
- else if(!strcasecmp(afname, "IPv6"))
- addressfamily = AF_INET6;
- else if(!strcasecmp(afname, "any"))
- addressfamily = AF_UNSPEC;
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
- return false;
+
+ int udp_fd = setup_vpn_in_socket(mesh, (sockaddr_t *) aip->ai_addr);
+
+ if(udp_fd < 0) {
+ close(tcp_fd);
+ continue;
}
- free(afname);
- }
- get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
+ io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].tcp, handle_new_meta_connection, &mesh->listen_socket[mesh->listen_sockets], tcp_fd, IO_READ);
+ io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].udp, handle_incoming_vpn_data, &mesh->listen_socket[mesh->listen_sockets], udp_fd, IO_READ);
- if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
- keylifetime = 3600;
+ if(mesh->log_level >= MESHLINK_INFO) {
+ char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+ logger(mesh, MESHLINK_INFO, "Listening on %s", hostname);
+ free(hostname);
+ }
- get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect);
+ mesh->listen_socket[mesh->listen_sockets].bindto = bindto;
+ memcpy(&mesh->listen_socket[mesh->listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+ mesh->listen_sockets++;
+ success = true;
+ }
- return true;
+ freeaddrinfo(ai);
+ return success;
}
/*
- Configure node_t myself and set up the local sockets (listen only)
+ Configure node_t mesh->self and set up the local sockets (listen only)
*/
-static bool setup_myself(void) {
- char *name, *hostname, *cipher, *digest, *type;
- char *fname = NULL;
+bool setup_myself(meshlink_handle_t *mesh) {
+ char *name;
char *address = NULL;
- if(!(name = get_name())) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
+ if(!(name = get_name(mesh))) {
+ logger(mesh, MESHLINK_ERROR, "Name for MeshLink instance required!");
return false;
}
- myself = new_node();
- myself->connection = new_connection();
- myself->name = name;
- myself->connection->name = xstrdup(name);
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
- read_config_options(config_tree, name);
- read_config_file(config_tree, fname);
- free(fname);
-
- if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
- myport = xstrdup("655");
-
- xasprintf(&myself->hostname, "MYSELF port %s", myport);
- myself->connection->hostname = xstrdup(myself->hostname);
-
- myself->connection->options = 0;
- myself->connection->protocol_major = PROT_MAJOR;
- myself->connection->protocol_minor = PROT_MINOR;
-
- myself->options |= PROT_MINOR << 24;
-
- get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental);
-
- if(experimental && !read_ecdsa_private_key())
- return false;
-
- if(!read_rsa_private_key())
- return false;
-
- if(!atoi(myport)) {
- struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
- sockaddr_t sa;
- if(!ai || !ai->ai_addr)
- return false;
- free(myport);
- memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
- sockaddr2str(&sa, NULL, &myport);
- }
-
- /* Read in all the subnets specified in the host configuration file */
-
- for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
- subnet_t *subnet;
-
- if(!get_config_subnet(cfg, &subnet))
- return false;
-
- subnet_add(myself, subnet);
- }
-
- /* Check some options */
-
- if(!setup_myself_reloadable())
- return false;
-
- get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
- get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
- strictsubnets |= tunnelserver;
-
-
+ mesh->self = new_node();
+ mesh->self->connection = new_connection();
+ mesh->self->name = name;
+ mesh->self->devclass = mesh->devclass;
+ mesh->self->connection->name = xstrdup(name);
+ read_host_config(mesh, mesh->config, name);
- if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
- if(udp_rcvbuf <= 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!");
- return false;
- }
- }
+ if(!get_config_string(lookup_config(mesh->config, "Port"), &mesh->myport)) {
+ int port = check_port(mesh);
- if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
- if(udp_sndbuf <= 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!");
+ if(port == 0) {
return false;
}
- }
- int replaywin_int;
- if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
- if(replaywin_int < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "ReplayWindow cannot be negative!");
- return false;
- }
- replaywin = (unsigned)replaywin_int;
- sptps_replaywin = replaywin;
+ xasprintf(&mesh->myport, "%d", port);
}
- /* Generate packet encryption key */
+ mesh->self->connection->options = 0;
+ mesh->self->connection->protocol_major = PROT_MAJOR;
+ mesh->self->connection->protocol_minor = PROT_MINOR;
- if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
- cipher = xstrdup("blowfish");
+ mesh->self->options |= PROT_MINOR << 24;
- if(!cipher_open_by_name(&myself->incipher, cipher)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
+ if(!read_ecdsa_private_key(mesh)) {
return false;
}
- free(cipher);
+ /* Ensure mesh->myport is numeric */
- regenerate_key();
-
- /* Check if we want to use message authentication codes... */
+ if(!atoi(mesh->myport)) {
+ struct addrinfo *ai = str2addrinfo("localhost", mesh->myport, SOCK_DGRAM);
+ sockaddr_t sa;
- int maclength = 4;
- get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
+ if(!ai || !ai->ai_addr) {
+ return false;
+ }
- if(maclength < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!");
- return false;
+ free(mesh->myport);
+ memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+ sockaddr2str(&sa, NULL, &mesh->myport);
}
- if(!get_config_string(lookup_config(config_tree, "Digest"), &digest))
- digest = xstrdup("sha1");
+ /* Check some options */
- if(!digest_open_by_name(&myself->indigest, digest, maclength)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
+ if(!setup_myself_reloadable(mesh)) {
return false;
}
- free(digest);
-
/* Compression */
- if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
- if(myself->incompression < 0 || myself->incompression > 11) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
- return false;
- }
- } else
- myself->incompression = 0;
-
- myself->connection->outcompression = 0;
+ // TODO: drop compression in the packet layer?
+ mesh->self->incompression = 0;
+ mesh->self->connection->outcompression = 0;
/* Done */
- myself->nexthop = myself;
- myself->via = myself;
- myself->status.reachable = true;
- myself->last_state_change = time(NULL);
- myself->status.sptps = experimental;
- node_add(myself);
-
- graph();
-
- if(strictsubnets)
- load_all_subnets();
- else if(autoconnect)
- load_all_nodes();
-
- /* Open device */
-
- devops = os_devops;
-
- if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
- if(!strcasecmp(type, "dummy"))
- devops = dummy_devops;
- else if(!strcasecmp(type, "raw_socket"))
- devops = raw_socket_devops;
- else if(!strcasecmp(type, "multicast"))
- devops = multicast_devops;
-#ifdef ENABLE_UML
- else if(!strcasecmp(type, "uml"))
- devops = uml_devops;
-#endif
-#ifdef ENABLE_VDE
- else if(!strcasecmp(type, "vde"))
- devops = vde_devops;
-#endif
- }
-
- if(!devops.setup())
- return false;
-
- if(device_fd >= 0) {
- event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL);
-
- if (event_add(&device_ev, NULL) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
- devops.close();
- return false;
- }
- }
-
- /* Run tinc-up script to further initialize the tap interface */
- char *envp[5];
- xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
- xasprintf(&envp[1], "DEVICE=%s", device ? : "");
- xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- xasprintf(&envp[3], "NAME=%s", myself->name);
- envp[4] = NULL;
+ mesh->self->nexthop = mesh->self;
+ mesh->self->via = mesh->self;
+ mesh->self->status.reachable = true;
+ mesh->self->last_state_change = mesh->loop.now.tv_sec;
- execute_script("tinc-up", envp);
+ node_write_devclass(mesh, mesh->self);
+ node_add(mesh, mesh->self);
- for(int i = 0; i < 4; i++)
- free(envp[i]);
+ graph(mesh);
- /* Run subnet-up scripts for our own subnets */
-
- subnet_update(myself, NULL, true);
+ load_all_nodes(mesh);
/* Open sockets */
- if(!do_detach && getenv("LISTEN_FDS")) {
- sockaddr_t sa;
- socklen_t salen;
-
- listen_sockets = atoi(getenv("LISTEN_FDS"));
-#ifdef HAVE_UNSETENV
- unsetenv("LISTEN_FDS");
-#endif
+ mesh->listen_sockets = 0;
- if(listen_sockets > MAXSOCKETS) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
- return false;
- }
+ if(!add_listen_address(mesh, address, NULL)) {
+ if(strcmp(mesh->myport, "0")) {
+ logger(mesh, MESHLINK_INFO, "Could not bind to port %s, asking OS to choose one for us", mesh->myport);
+ free(mesh->myport);
+ mesh->myport = strdup("0");
- for(int i = 0; i < listen_sockets; i++) {
- salen = sizeof sa;
- if(getsockname(i + 3, &sa.sa, &salen) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
+ if(!mesh->myport) {
return false;
}
- listen_socket[i].tcp = i + 3;
-
-#ifdef FD_CLOEXEC
- fcntl(i + 3, F_SETFD, FD_CLOEXEC);
-#endif
-
- listen_socket[i].udp = setup_vpn_in_socket(&sa);
- if(listen_socket[i].udp < 0)
+ if(!add_listen_address(mesh, address, NULL)) {
return false;
-
- event_set(&listen_socket[i].ev_tcp, listen_socket[i].tcp, EV_READ|EV_PERSIST, handle_new_meta_connection, NULL);
- if(event_add(&listen_socket[i].ev_tcp, NULL) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
- abort();
- }
-
- event_set(&listen_socket[i].ev_udp, listen_socket[i].udp, EV_READ|EV_PERSIST, handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets);
- if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
- abort();
}
-
- if(debug_level >= DEBUG_CONNECTIONS) {
- hostname = sockaddr2hostname(&sa);
- logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
- free(hostname);
- }
-
- memcpy(&listen_socket[i].sa, &sa, salen);
+ } else {
+ return false;
}
- } else {
- listen_sockets = 0;
- config_t *cfg = lookup_config(config_tree, "BindToAddress");
-
- do {
- get_config_string(cfg, &address);
- if(cfg)
- cfg = lookup_config_next(config_tree, cfg);
-
- char *port = myport;
-
- if(address) {
- char *space = strchr(address, ' ');
- if(space) {
- *space++ = 0;
- port = space;
- }
-
- if(!strcmp(address, "*"))
- *address = 0;
- }
-
- struct addrinfo *ai, hint = {0};
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
-
- int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
- free(address);
-
- if(err || !ai) {
- logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
- gai_strerror(err));
- return false;
- }
-
- for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
- if(listen_sockets >= MAXSOCKETS) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
- return false;
- }
-
- listen_socket[listen_sockets].tcp =
- setup_listen_socket((sockaddr_t *) aip->ai_addr);
-
- if(listen_socket[listen_sockets].tcp < 0)
- continue;
-
- listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
-
- if(listen_socket[listen_sockets].udp < 0) {
- close(listen_socket[listen_sockets].tcp);
- continue;
- }
-
- event_set(&listen_socket[listen_sockets].ev_tcp,
- listen_socket[listen_sockets].tcp,
- EV_READ|EV_PERSIST,
- handle_new_meta_connection, NULL);
- if(event_add(&listen_socket[listen_sockets].ev_tcp, NULL) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
- abort();
- }
-
- event_set(&listen_socket[listen_sockets].ev_udp,
- listen_socket[listen_sockets].udp,
- EV_READ|EV_PERSIST,
- handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets);
- if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
- abort();
- }
-
- if(debug_level >= DEBUG_CONNECTIONS) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
- free(hostname);
- }
-
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
- }
-
- freeaddrinfo(ai);
- } while(cfg);
}
- if(listen_sockets)
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
- else {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
+ if(!mesh->listen_sockets) {
+ logger(mesh, MESHLINK_ERROR, "Unable to create any listening socket!");
return false;
}
- last_config_check = time(NULL);
+ /* Done. */
+
+ mesh->last_config_check = mesh->loop.now.tv_sec;
return true;
}
/*
initialize network
*/
-bool setup_network(void) {
- init_connections();
- init_subnets();
- init_nodes();
- init_edges();
- init_requests();
-
- if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
- if(pinginterval < 1) {
- pinginterval = 86400;
- }
- } else
- pinginterval = 60;
-
- if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
- pingtimeout = 5;
- if(pingtimeout < 1 || pingtimeout > pinginterval)
- pingtimeout = pinginterval;
-
- if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
- maxoutbufsize = 10 * MTU;
-
- if(!setup_myself())
+bool setup_network(meshlink_handle_t *mesh) {
+ init_connections(mesh);
+ init_submeshes(mesh);
+ init_nodes(mesh);
+ init_edges(mesh);
+ init_requests(mesh);
+
+ mesh->pinginterval = 60;
+ mesh->pingtimeout = 5;
+ maxoutbufsize = 10 * MTU;
+
+ if(!setup_myself(mesh)) {
return false;
+ }
return true;
}
/*
close all open network connections
*/
-void close_network_connections(void) {
- for(list_node_t *node = connection_list->head, *next; node; node = next) {
- next = node->next;
- connection_t *c = node->data;
- /* Keep control connections open until the end, so they know when we really terminated */
- if(c->status.control)
- c->socket = -1;
- c->outgoing = NULL;
- terminate_connection(c, false);
+void close_network_connections(meshlink_handle_t *mesh) {
+ if(mesh->connections) {
+ for(list_node_t *node = mesh->connections->head, *next; node; node = next) {
+ next = node->next;
+ connection_t *c = node->data;
+ c->outgoing = NULL;
+ terminate_connection(mesh, c, false);
+ }
}
- list_delete_list(outgoing_list);
-
- if(myself && myself->connection) {
- subnet_update(myself, NULL, false);
- terminate_connection(myself->connection, false);
- free_connection(myself->connection);
+ if(mesh->outgoings) {
+ list_delete_list(mesh->outgoings);
}
- for(int i = 0; i < listen_sockets; i++) {
- event_del(&listen_socket[i].ev_tcp);
- event_del(&listen_socket[i].ev_udp);
- close(listen_socket[i].tcp);
- close(listen_socket[i].udp);
+ if(mesh->self && mesh->self->connection) {
+ terminate_connection(mesh, mesh->self->connection, false);
+ free_connection(mesh->self->connection);
}
- char *envp[5];
- xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
- xasprintf(&envp[1], "DEVICE=%s", device ? : "");
- xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- xasprintf(&envp[3], "NAME=%s", myself->name);
- envp[4] = NULL;
-
- exit_requests();
- exit_edges();
- exit_subnets();
- exit_nodes();
- exit_connections();
-
- execute_script("tinc-down", envp);
-
- if(myport) free(myport);
+ for(int i = 0; i < mesh->listen_sockets; i++) {
+ io_del(&mesh->loop, &mesh->listen_socket[i].tcp);
+ io_del(&mesh->loop, &mesh->listen_socket[i].udp);
+ close(mesh->listen_socket[i].tcp.fd);
+ close(mesh->listen_socket[i].udp.fd);
+ }
- for(int i = 0; i < 4; i++)
- free(envp[i]);
+ exit_requests(mesh);
+ exit_edges(mesh);
+ exit_nodes(mesh);
+ exit_connections(mesh);
- devops.close();
+ if(mesh->myport) {
+ free(mesh->myport);
+ }
return;
}
projects / meshlink / blobdiff