/*
libmeshlink.h -- Tincd Library
- Copyright (C) 2014 Guus Sliepen <guus@tinc-vpn.org> Saverio Proto <zioproto@gmail.com>
+ Copyright (C) 2014 Guus Sliepen <guus@meshlink.io> Saverio Proto <zioproto@gmail.com>
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 "libmeshlink.h"
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
#include "crypto.h"
#include "ecdsagen.h"
char *hosts_dir = NULL;
static char *name = NULL;
+char *tinc_conf = NULL;
+static bool tty = false;
+#ifdef HAVE_MLOCKALL
+/* If nonzero, disable swapping for this process. */
+static bool do_mlock = false;
+#endif
+
+/*
+ initialize network
+*/
+bool setup_meshlink_network(void) {
+ init_connections();
+ 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;
+
+ //TODO: check if this makes sense in libmeshlink
+ if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
+ maxoutbufsize = 10 * MTU;
+
+ if(!setup_myself())
+ return false;
+
+ return true;
+}
+
+/* Open a file with the desired permissions, minus the umask.
+ Also, if we want to create an executable file, we call fchmod()
+ to set the executable bits. */
+
+FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
+ mode_t mask = umask(0);
+ perms &= ~mask;
+ umask(~perms);
+ FILE *f = fopen(filename, mode);
+#ifdef HAVE_FCHMOD
+ if((perms & 0444) && f)
+ fchmod(fileno(f), perms);
+#endif
+ umask(mask);
+ return f;
+}
+
+static void disable_old_keys(const char *filename, const char *what) {
+ char tmpfile[PATH_MAX] = "";
+ char buf[1024];
+ bool disabled = false;
+ bool block = false;
+ bool error = false;
+ FILE *r, *w;
+
+ r = fopen(filename, "r");
+ if(!r)
+ return;
+
+ snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
+
+ struct stat st = {.st_mode = 0600};
+ fstat(fileno(r), &st);
+ w = fopenmask(tmpfile, "w", st.st_mode);
+
+ while(fgets(buf, sizeof buf, r)) {
+ if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
+ if((strstr(buf, " EC ") && strstr(what, "ECDSA")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
+ disabled = true;
+ block = true;
+ }
+ }
+
+ bool ecdsapubkey = !strncasecmp(buf, "ECDSAPublicKey", 14) && strchr(" \t=", buf[14]) && strstr(what, "ECDSA");
+
+ if(ecdsapubkey)
+ disabled = true;
+
+ if(w) {
+ if(block || ecdsapubkey)
+ fputc('#', w);
+ if(fputs(buf, w) < 0) {
+ error = true;
+ break;
+ }
+ }
+
+ if(block && !strncmp(buf, "-----END ", 9))
+ block = false;
+ }
+
+ if(w)
+ if(fclose(w) < 0)
+ error = true;
+ if(ferror(r) || fclose(r) < 0)
+ error = true;
+
+ if(disabled) {
+ if(!w || error) {
+ fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
+ if(w)
+ unlink(tmpfile);
+ return;
+ }
+
+#ifdef HAVE_MINGW
+ // We cannot atomically replace files on Windows.
+ char bakfile[PATH_MAX] = "";
+ snprintf(bakfile, sizeof bakfile, "%s.bak", filename);
+ if(rename(filename, bakfile) || rename(tmpfile, filename)) {
+ rename(bakfile, filename);
+#else
+ if(rename(tmpfile, filename)) {
+#endif
+ fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
+ } else {
+#ifdef HAVE_MINGW
+ unlink(bakfile);
+#endif
+ fprintf(stderr, "Warning: old key(s) found and disabled.\n");
+ }
+ }
+
+ unlink(tmpfile);
+}
+
+static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
+ FILE *r;
+ char *directory;
+ char buf[PATH_MAX];
+ char buf2[PATH_MAX];
+
+ /* Check stdin and stdout */
+ if(ask && tty) {
+ /* Ask for a file and/or directory name. */
+ fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
+
+ if(fgets(buf, sizeof buf, stdin) == NULL) {
+ fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
+ return NULL;
+ }
+
+ size_t len = strlen(buf);
+ if(len)
+ buf[--len] = 0;
+
+ if(len)
+ filename = buf;
+ }
+
+#ifdef HAVE_MINGW
+ if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
+#else
+ if(filename[0] != '/') {
+#endif
+ /* The directory is a relative path or a filename. */
+ directory = get_current_dir_name();
+ snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
+ filename = buf2;
+ }
+
+ disable_old_keys(filename, what);
+
+ /* Open it first to keep the inode busy */
+
+ r = fopenmask(filename, mode, perms);
+
+ if(!r) {
+ fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
+ return NULL;
+ }
+
+ return r;
+}
/*
Generate a public/private ECDSA keypair, and ask for a file to store
fprintf(stderr, "Done.\n");
xasprintf(&privname, "%s" SLASH "ecdsa_key.priv", confbase);
- //f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600); //this function is not ported to lib because makes no sense
+ f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600);
free(privname);
if(!f)
else
xasprintf(&pubname, "%s" SLASH "ecdsa_key.pub", confbase);
- //f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
+ f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
free(pubname);
if(!f)
fprintf(stderr, "Done.\n");
xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
- //f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
+ f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
free(privname);
if(!f)
else
xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
- //f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
+ f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
free(pubname);
if(!f)
return 0;
}
//tinc_setup() should basically do what cmd_init() from src/tincctl.c does, except it doesn't have to generate a tinc-up script.
-bool tinc_setup(const char* tinc_conf, const char* name) {
+bool tinc_setup(const char* confbaseapi, const char* name) {
+ confbase = xstrdup(confbaseapi);
+ xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
+ xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
if(!access(tinc_conf, F_OK)) {
fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
return false;
return false;
}
- if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
- return false;
- }
-
if(mkdir(confbase, 0777) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
return false;
}
-bool tinc_start(const char* path);
+bool tinc_start(const char* confbaseapi) {
+ pthread_t tincThread;
+ confbase = confbaseapi;
+ pthread_create(&tincThread,NULL,tinc_main_thread,confbaseapi);
+ pthread_detach(tincThread);
+return true;
+}
+
+bool tinc_main_thread(void * in) {
+ static bool status = false;
+
+ /* If nonzero, write log entries to a separate file. */
+ bool use_logfile = false;
+
+ confbase = (char*) in;
+
+ openlogger("tinc", LOGMODE_STDERR);
+
+ init_configuration(&config_tree);
+
+ /* Slllluuuuuuurrrrp! */
+
+ gettimeofday(&now, NULL);
+ srand(now.tv_sec + now.tv_usec);
+ crypto_init();
+
+ if(!read_server_config())
+ return false;
+
+ //char *priority = NULL; //shoud be not needed in libmeshlink
+
+#ifdef HAVE_MLOCKALL
+ /* Lock all pages into memory if requested.
+ * This has to be done after daemon()/fork() so it works for child.
+ * No need to do that in parent as it's very short-lived. */
+ if(do_mlock && mlockall(MCL_CURRENT | MCL_FUTURE) != 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "mlockall",
+ strerror(errno));
+ return 1;
+ }
+#endif
+
+ /* Setup sockets and open device. */
+
+ if(!setup_meshlink_network())
+ goto end;
+
+ /* Change process priority */
+ //should be not needed in libmeshlink
+ //if(get_config_string(lookup_config(config_tree, "ProcessPriority"), &priority)) {
+ // if(!strcasecmp(priority, "Normal")) {
+ // if (setpriority(NORMAL_PRIORITY_CLASS) != 0) {
+ // logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ // goto end;
+ // }
+ // } else if(!strcasecmp(priority, "Low")) {
+ // if (setpriority(BELOW_NORMAL_PRIORITY_CLASS) != 0) {
+ // logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ // goto end;
+ // }
+ // } else if(!strcasecmp(priority, "High")) {
+ // if (setpriority(HIGH_PRIORITY_CLASS) != 0) {
+ // logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ // goto end;
+ // }
+ // } else {
+ // logger(DEBUG_ALWAYS, LOG_ERR, "Invalid priority `%s`!", priority);
+ // goto end;
+ // }
+ //}
+
+ /* drop privileges */
+ //if (!drop_privs())
+ // goto end;
+
+ /* Start main loop. It only exits when tinc is killed. */
+
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
+
+ try_outgoing_connections();
+
+ status = main_loop();
+
+ /* Shutdown properly. */
+
+end:
+ close_network_connections();
+
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
+
+ //free(priority);
+
+ crypto_exit();
+
+ exit_configuration(&config_tree);
+
+ return status;
+
+}
bool tinc_stop();
+bool route_meshlink(node_t *source,vpn_packet_t *packet) {
+
+ printf("data %s\n",packet->data);
+ printf("data 16%s\n",packet->data+16);
+ printf("data 32%s\n",packet->data+32);
+ node_t* owner = NULL;
+
+ tincpackethdr* hdr = (tincpackethdr*)packet->data;
+ owner = lookup_node(hdr->destination);
+
+ if (owner == NULL) {
+ //Lookup failed
+ printf("NULL\n");
+ return false;
+ }
+ printf("lookupnode %s\n",owner->name);
+
+ if(!owner->status.reachable) {
+ //Do some here
+ return false;
+ }
+
+ //TODO: I skipped here a lot of checks !
+
+ send_packet(owner,packet);
+
+}
// can be called from any thread
-bool tinc_send_packet(node_t *receiver, const char* buf, unsigned int len);
+bool tinc_send_packet(node_t *receiver, const char* buf, unsigned int len) {
+
+ vpn_packet_t packet;
+ tincpackethdr* hdr = malloc(sizeof(tincpackethdr));
+
+ if (sizeof(hdr) + len > MAXSIZE) {
+
+ //log something
+ return false;
+ }
+
+ memcpy(hdr->destination,receiver->name,sizeof(hdr->destination));
+ memcpy(hdr->source,myself->name,sizeof(hdr->source));
+
+ packet.priority = 0;
+ packet.len = len + 32;
+
+ memcpy(packet.data,hdr,32);
+ memcpy(packet.data+32,buf,len);
+
+ myself->in_packets++;
+ myself->in_bytes += packet.len;
+ route_meshlink(myself, &packet);
+
+return true;
+}
// handler runs in tinc thread and should return immediately
bool tinc_set_packet_receive_handler(void (*handler)(const char* sender, const char* buf, unsigned int len));
//It might also be a good idea to add the option of looking up hosts by public
//key (fingerprints) instead of names.
-node_t *tinc_get_host(const char *name);
+node_t *tinc_get_host(const char *name) {
+
+
+
+};
bool tinc_get_hosts(node_t** hosts);
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