#include "crypto.h"
#include "ecdsagen.h"
#include "meshlink_internal.h"
+#include "netutl.h"
#include "node.h"
#include "protocol.h"
#include "route.h"
+#include "utils.h"
#include "xalloc.h"
#include "ed25519/sha512.h"
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
//TODO: this can go away completely
const var_t variables[] = {
fclose(in);
return true;
}
+
+static int rstrip(char *value) {
+ int len = strlen(value);
+ while(len && strchr("\t\r\n ", value[len - 1]))
+ value[--len] = 0;
+ return len;
+}
+
static void scan_for_hostname(const char *filename, char **hostname, char **port) {
char line[4096];
if(!filename || (*hostname && *port))
char *port = NULL;
char *hostport = NULL;
char *name = mesh->self->name;
- char filename[PATH_MAX];
+ char filename[PATH_MAX] = "";
char line[4096];
+ FILE *f;
// Use first Address statement in own host config file
- snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
scan_for_hostname(filename, &hostname, &port);
- scan_for_hostname(mesh->meshlink_conf, &hostname, &port);
if(hostname)
goto done;
}
}
- //if(!tty) {
- // if(!hostname) {
- // fprintf(stderr, "Could not determine the external address or hostname. Please set Address manually.\n");
- // return NULL;
- // }
- // goto save;
- //}
-
-again:
- fprintf(stderr, "Please enter your host's external address or hostname");
- if(hostname)
- fprintf(stderr, " [%s]", hostname);
- fprintf(stderr, ": ");
-
- if(!fgets(line, sizeof line, stdin)) {
- fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
- free(hostname);
+ if(!hostname)
return NULL;
- }
-
- if(!rstrip(line)) {
- if(hostname)
- goto save;
- else
- goto again;
- }
-
- for(char *p = line; *p; p++) {
- if(isalnum(*p) || *p == '-' || *p == '.')
- continue;
- fprintf(stderr, "Invalid address or hostname.\n");
- goto again;
- }
-
- free(hostname);
- hostname = xstrdup(line);
-save:
- if(filename) {
- FILE *f = fopen(filename, "a");
- if(f) {
- fprintf(f, "\nAddress = %s\n", hostname);
- fclose(f);
- } else {
- fprintf(stderr, "Could not append Address to %s: %s\n", filename, strerror(errno));
- }
+ f = fopen(filename, "a");
+ if(f) {
+ fprintf(f, "\nAddress = %s\n", hostname);
+ fclose(f);
+ } else {
+ fprintf(stderr, "Could not append Address to %s: %s\n", filename, strerror(errno));
}
done:
return NULL;
return val;
}
-static 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 bool try_bind(int port) {
+ struct addrinfo *ai = NULL;
+ struct addrinfo hint = {
+ .ai_flags = AI_PASSIVE,
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ };
+
+ char portstr[16];
+ snprintf(portstr, sizeof portstr, "%d", port);
+
+ if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
+ return false;
+
+ while(ai) {
+ int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ if(!fd)
+ return false;
+ int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+ closesocket(fd);
+ if(result)
+ return false;
+ ai = ai->ai_next;
+ }
+
+ return true;
+}
+
+static int check_port(meshlink_handle_t *mesh) {
+ if(try_bind(655))
+ return 655;
+
+ fprintf(stderr, "Warning: could not bind to port 655.\n");
+
+ for(int i = 0; i < 100; i++) {
+ int port = 0x1000 + (rand() & 0x7fff);
+ if(try_bind(port)) {
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->name);
+ FILE *f = fopen(filename, "a");
+ if(!f) {
+ fprintf(stderr, "Please change MeshLink's Port manually.\n");
+ return 0;
+ }
+
+ fprintf(f, "Port = %d\n", port);
+ fclose(f);
+ fprintf(stderr, "MeshLink will instead listen on port %d.\n", port);
+ return port;
+ }
+ }
+
+ fprintf(stderr, "Please change MeshLink's Port manually.\n");
+ return 0;
}
static bool finalize_join(meshlink_handle_t *mesh) {
return false;
}
- if(mkdir(mesh->confbase, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
- return false;
- }
-
- if(mkdir(mesh->hosts_dir, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->hosts_dir, strerror(errno));
- return false;
- }
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
- FILE *f = fopen(mesh->meshlink_conf, "w");
+ FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", mesh->meshlink_conf, strerror(errno));
+ fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
return false;
}
fprintf(f, "Name = %s\n", name);
- char filename[PATH_MAX];
- snprintf(filename,PATH_MAX, "%s" SLASH "%s", mesh->hosts_dir, name);
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
FILE *fh = fopen(filename, "w");
if(!fh) {
fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ fclose(f);
return false;
}
return false;
}
- snprintf(filename,PATH_MAX, "%s" SLASH "%s", mesh->hosts_dir, value);
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, value);
f = fopen(filename, "w");
if(!f) {
fclose(f);
}
- // Generate our key and send a copy to the server
- ecdsa_t *key = ecdsa_generate();
- if(!key)
- return false;
-
- char *b64key = ecdsa_get_base64_public_key(key);
+ char *b64key = ecdsa_get_base64_public_key(mesh->self->connection->ecdsa);
if(!b64key)
return false;
- snprintf(filename,PATH_MAX, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
- f = fopenmask(filename, "w", 0600);
-
- if(!ecdsa_write_pem_private_key(key, f)) {
- fprintf(stderr, "Error writing private key!\n");
- ecdsa_free(key);
- fclose(f);
- return false;
- }
-
- fclose(f);
-
fprintf(fh, "ECDSAPublicKey = %s\n", b64key);
+ fprintf(fh, "Port = %s\n", mesh->myport);
+
+ fclose(fh);
sptps_send_record(&(mesh->sptps), 1, b64key, strlen(b64key));
free(b64key);
- ecdsa_free(key);
-
- check_port(name);
+ free(mesh->self->name);
+ free(mesh->self->connection->name);
+ mesh->self->name = xstrdup(name);
+ mesh->self->connection->name = xstrdup(name);
fprintf(stderr, "Configuration stored in: %s\n", mesh->confbase);
+ load_all_nodes(mesh);
+
return true;
}
-static bool invitation_send(void *handle, uint8_t type, const char *data, size_t len) {
+static bool invitation_send(void *handle, uint8_t type, const void *data, size_t len) {
meshlink_handle_t* mesh = handle;
while(len) {
int result = send(mesh->sock, data, len, 0);
return true;
}
-static bool invitation_receive(void *handle, uint8_t type, const char *msg, uint16_t len) {
+static bool invitation_receive(void *handle, uint8_t type, const void *msg, uint16_t len) {
meshlink_handle_t* mesh = handle;
switch(type) {
case SPTPS_HANDSHAKE:
return true;
}
-int rstrip(char *value) {
- int len = strlen(value);
- while(len && strchr("\t\r\n ", value[len - 1]))
- value[--len] = 0;
- return len;
-}
-
static const char *errstr[] = {
[MESHLINK_OK] = "No error",
return true;
}
-static bool try_bind(int port) {
- struct addrinfo *ai = NULL;
- struct addrinfo hint = {
- .ai_flags = AI_PASSIVE,
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_STREAM,
- .ai_protocol = IPPROTO_TCP,
- };
-
- char portstr[16];
- snprintf(portstr, sizeof portstr, "%d", port);
-
- if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
- return false;
-
- while(ai) {
- int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
- if(!fd)
- return false;
- int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
- closesocket(fd);
- if(result)
- return false;
- ai = ai->ai_next;
- }
-
- return true;
-}
-
-int check_port(meshlink_handle_t *mesh) {
- if(try_bind(655))
- return 655;
-
- fprintf(stderr, "Warning: could not bind to port 655.\n");
-
- for(int i = 0; i < 100; i++) {
- int port = 0x1000 + (rand() & 0x7fff);
- if(try_bind(port)) {
- char filename[PATH_MAX];
- snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->name);
- FILE *f = fopen(filename, "a");
- if(!f) {
- fprintf(stderr, "Please change MeshLink's Port manually.\n");
- return 0;
- }
-
- fprintf(f, "Port = %d\n", port);
- fclose(f);
- fprintf(stderr, "MeshLink will instead listen on port %d.\n", port);
- return port;
- }
- }
-
- fprintf(stderr, "Please change MeshLink's Port manually.\n");
- return 0;
-}
-
static bool meshlink_setup(meshlink_handle_t *mesh) {
-
if(mkdir(mesh->confbase, 0777) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
return false;
}
- snprintf(mesh->hosts_dir, sizeof mesh->hosts_dir, "%s" SLASH "hosts", mesh->confbase);
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts", mesh->confbase);
- if(mkdir(mesh->hosts_dir, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->hosts_dir, strerror(errno));
+ if(mkdir(filename, 0777) && errno != EEXIST) {
+ fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
return false;
}
- snprintf(mesh->meshlink_conf, sizeof mesh->meshlink_conf, "%s" SLASH "meshlink.conf", mesh->confbase);
+ snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
- if(!access(mesh->meshlink_conf, F_OK)) {
- fprintf(stderr, "Configuration file %s already exists!\n", mesh->meshlink_conf);
+ if(!access(filename, F_OK)) {
+ fprintf(stderr, "Configuration file %s already exists!\n", filename);
return false;
}
- FILE *f = fopen(mesh->meshlink_conf, "w");
+ FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", mesh->meshlink_conf, strerror(errno));
+ fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
return 1;
}
meshlink_handle_t *meshlink_open(const char *confbase, const char *name) {
// Validate arguments provided by the application
+ bool usingname = false;
if(!confbase || !*confbase) {
fprintf(stderr, "No confbase given!\n");
if(!name || !*name) {
fprintf(stderr, "No name given!\n");
- return NULL;
+ //return NULL;
}
+ else { //check name only if there is a name != NULL
- if(!check_id(name)) {
- fprintf(stderr, "Invalid name given!\n");
- return NULL;
+ if(!check_id(name)) {
+ fprintf(stderr, "Invalid name given!\n");
+ return NULL;
+ } else { usingname = true;}
}
meshlink_handle_t *mesh = xzalloc(sizeof *mesh);
mesh->confbase = xstrdup(confbase);
- mesh->name = xstrdup(name);
+ if (usingname) mesh->name = xstrdup(name);
+ pthread_mutex_init ( &(mesh->outpacketqueue_mutex), NULL);
+ pthread_mutex_init ( &(mesh->nodes_mutex), NULL);
+ mesh->threadstarted = false;
event_loop_init(&mesh->loop);
mesh->loop.data = mesh;
if(!read_server_config(mesh))
return meshlink_close(mesh), NULL;
+#ifdef HAVE_MINGW
+ struct WSAData wsa_state;
+ WSAStartup(MAKEWORD(2, 2), &wsa_state);
+#endif
+
// Setup up everything
// TODO: we should not open listening sockets yet
bool meshlink_start(meshlink_handle_t *mesh) {
// TODO: open listening sockets first
+ //Check that a valid name is set
+ if(!mesh->name ) {
+ fprintf(stderr, "No name given!\n");
+ return false;
+ }
+
// Start the main thread
if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
return false;
}
+ mesh->threadstarted=true;
+
return true;
}
void meshlink_stop(meshlink_handle_t *mesh) {
- // TODO: close the listening sockets to signal the main thread to shut down
+ // Shut down the listening sockets to signal the main thread to shut down
+
+ for(int i = 0; i < mesh->listen_sockets; i++) {
+ shutdown(mesh->listen_socket[i].tcp.fd, SHUT_RDWR);
+ shutdown(mesh->listen_socket[i].udp.fd, SHUT_RDWR);
+ }
// Wait for the main thread to finish
exit_configuration(&mesh->config);
event_loop_exit(&mesh->loop);
+
+ free(mesh);
+
+#ifdef HAVE_MINGW
+ WSACleanup();
+#endif
}
void meshlink_set_receive_cb(meshlink_handle_t *mesh, meshlink_receive_cb_t cb) {
}
bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, unsigned int len) {
+
+ /* If there is no outgoing list yet, create one. */
+
+ if(!mesh->outpacketqueue)
+ mesh->outpacketqueue = list_alloc(NULL);
+
+ //add packet to the queue
+ outpacketqueue_t *packet_in_queue = xzalloc(sizeof *packet_in_queue);
+ packet_in_queue->destination=destination;
+ packet_in_queue->data=data;
+ packet_in_queue->len=len;
+ pthread_mutex_lock(&(mesh->outpacketqueue_mutex));
+ list_insert_head(mesh->outpacketqueue,packet_in_queue);
+ pthread_mutex_unlock(&(mesh->outpacketqueue_mutex));
+
+ //notify event loop
+ signal_trigger(&(mesh->loop),&(mesh->datafromapp));
+ return true;
+}
+
+void meshlink_send_from_queue(event_loop_t* el,meshlink_handle_t *mesh) {
vpn_packet_t packet;
meshlink_packethdr_t *hdr = (meshlink_packethdr_t *)packet.data;
- if (sizeof(meshlink_packethdr_t) + len > MAXSIZE) {
+
+ outpacketqueue_t* p = list_get_tail(mesh->outpacketqueue);
+ if (p)
+ list_delete_tail(mesh->outpacketqueue);
+ else return ;
+
+ if (sizeof(meshlink_packethdr_t) + p->len > MAXSIZE) {
//log something
- return false;
+ return ;
}
packet.probe = false;
memset(hdr, 0, sizeof *hdr);
- memcpy(hdr->destination, destination->name, sizeof hdr->destination);
+ memcpy(hdr->destination, p->destination->name, sizeof hdr->destination);
memcpy(hdr->source, mesh->self->name, sizeof hdr->source);
- packet.len = sizeof *hdr + len;
- memcpy(packet.data + sizeof *hdr, data, len);
+ packet.len = sizeof *hdr + p->len;
+ memcpy(packet.data + sizeof *hdr, p->data, p->len);
mesh->self->in_packets++;
mesh->self->in_bytes += packet.len;
route(mesh, mesh->self, &packet);
- return false;
+ return ;
}
meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
- return (meshlink_node_t *)lookup_node(mesh, name);
- return NULL;
+ return (meshlink_node_t *)lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
}
size_t meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t nmemb) {
- return 0;
-}
+ size_t i = 0;
-char *meshlink_sign(meshlink_handle_t *mesh, const char *data, size_t len) {
- return NULL;
-}
-
-bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const char *data, size_t len, const char *signature) {
- return false;
-}
+ //lock mesh->nodes
+ pthread_mutex_lock(&(mesh->nodes_mutex));
-char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
- // Check validity of the new node's name
- if(!check_id(name)) {
- fprintf(stderr, "Invalid name for node.\n");
- return NULL;
+ for splay_each(node_t, n, mesh->nodes) {
+ if(i < nmemb)
+ nodes[i] = (meshlink_node_t *)n;
+ i++;
}
- // Ensure no host configuration file with that name exists
- char filename [PATH_MAX];
- snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
- if(!access(filename, F_OK)) {
- fprintf(stderr, "A host config file for %s already exists!\n", name);
- return NULL;
- }
+ pthread_mutex_unlock(&(mesh->nodes_mutex));
- // If a daemon is running, ensure no other nodes know about this name
-
- //TODO: original tinc code connects to tincd cli and makes this check. How we want to implement this here ?
- //bool found = false;
- //if(connect_tincd(false)) {
- // sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ return i;
+}
- // while(recvline(fd, line, sizeof line)) {
- // char node[4096];
- // int code, req;
- // if(sscanf(line, "%d %d %s", &code, &req, node) != 3)
- // break;
- // if(!strcmp(node, name))
- // found = true;
- // }
+bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
+ if(*siglen < MESHLINK_SIGLEN)
+ return false;
+ if(!ecdsa_sign(mesh->self->connection->ecdsa, data, len, signature))
+ return false;
+ *siglen = MESHLINK_SIGLEN;
+ return true;
+}
- // if(found) {
- // fprintf(stderr, "A node with name %s is already known!\n", name);
- // return 1;
- // }
- //}
+bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
+ if(siglen != MESHLINK_SIGLEN)
+ return false;
+ struct node_t *n = (struct node_t *)source;
+ node_read_ecdsa_public_key(mesh, n);
+ if(!n->ecdsa)
+ return false;
+ return ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
+}
- char hash[64];
+static bool refresh_invitation_key(meshlink_handle_t *mesh) {
+ char filename[PATH_MAX];
- snprintf(filename,PATH_MAX, "%s" SLASH "invitations", mesh->confbase);
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations", mesh->confbase);
if(mkdir(filename, 0700) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
- return NULL;
+ return false;
}
// Count the number of valid invitations, clean up old ones
DIR *dir = opendir(filename);
if(!dir) {
fprintf(stderr, "Could not read directory %s: %s\n", filename, strerror(errno));
- return NULL;
+ return false;
}
errno = 0;
continue;
char invname[PATH_MAX];
struct stat st;
- snprintf(invname,PATH_MAX, "%s" SLASH "%s", filename, ent->d_name);
+ snprintf(invname, sizeof invname, "%s" SLASH "%s", filename, ent->d_name);
if(!stat(invname, &st)) {
- if(deadline < st.st_mtime)
+ if(mesh->invitation_key && deadline < st.st_mtime)
count++;
else
unlink(invname);
if(errno) {
fprintf(stderr, "Error while reading directory %s: %s\n", filename, strerror(errno));
closedir(dir);
- return NULL;
+ return false;
}
closedir(dir);
- ecdsa_t *key;
- snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
// Remove the key if there are no outstanding invitations.
- if(!count)
+ if(!count) {
unlink(filename);
+ if(mesh->invitation_key) {
+ ecdsa_free(mesh->invitation_key);
+ mesh->invitation_key = NULL;
+ }
+ }
+
+ if(mesh->invitation_key)
+ return true;
// Create a new key if necessary.
FILE *f = fopen(filename, "r");
if(!f) {
if(errno != ENOENT) {
fprintf(stderr, "Could not read %s: %s\n", filename, strerror(errno));
- return NULL;
+ return false;
}
- key = ecdsa_generate();
- if(!key) {
+ mesh->invitation_key = ecdsa_generate();
+ if(!mesh->invitation_key) {
fprintf(stderr, "Could not generate a new key!\n");
- return NULL;
+ return false;
}
f = fopen(filename, "w");
if(!f) {
fprintf(stderr, "Could not write %s: %s\n", filename, strerror(errno));
- return NULL;
+ return false;
}
chmod(filename, 0600);
- ecdsa_write_pem_private_key(key, f);
+ ecdsa_write_pem_private_key(mesh->invitation_key, f);
fclose(f);
- //TODO: handle this in meshlink
- //if(connect_tincd(false))
- // sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
} else {
- key = ecdsa_read_pem_private_key(f);
+ mesh->invitation_key = ecdsa_read_pem_private_key(f);
fclose(f);
- if(!key)
+ if(!mesh->invitation_key)
fprintf(stderr, "Could not read private key from %s\n", filename);
}
- if(!key)
+ return mesh->invitation_key;
+}
+
+bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
+ for(const char *p = address; *p; p++) {
+ if(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')
+ continue;
+ fprintf(stderr, "Invalid character in address: %s\n", address);
+ return false;
+ }
+
+ return append_config_file(mesh, mesh->self->name, "Address", address);
+}
+
+char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
+ // Check validity of the new node's name
+ if(!check_id(name)) {
+ fprintf(stderr, "Invalid name for node.\n");
+ return NULL;
+ }
+
+ // Ensure no host configuration file with that name exists
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ if(!access(filename, F_OK)) {
+ fprintf(stderr, "A host config file for %s already exists!\n", name);
+ return NULL;
+ }
+
+ // Ensure no other nodes know about this name
+ if(meshlink_get_node(mesh, name)) {
+ fprintf(stderr, "A node with name %s is already known!\n", name);
+ return NULL;
+ }
+
+ // Get the local address
+ char *address = get_my_hostname(mesh);
+ if(!address) {
+ fprintf(stderr, "No Address known for ourselves!\n");
+ return NULL;
+ }
+
+ if(!refresh_invitation_key(mesh))
return NULL;
+ char hash[64];
+
// Create a hash of the key.
- char *fingerprint = ecdsa_get_base64_public_key(key);
+ char *fingerprint = ecdsa_get_base64_public_key(mesh->invitation_key);
sha512(fingerprint, strlen(fingerprint), hash);
b64encode_urlsafe(hash, hash, 18);
b64encode_urlsafe(cookie, cookie, 18);
// Create a file containing the details of the invitation.
- snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "%s", mesh->confbase, cookiehash);
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "%s", mesh->confbase, cookiehash);
int ifd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
if(!ifd) {
fprintf(stderr, "Could not create invitation file %s: %s\n", filename, strerror(errno));
return NULL;
}
- f = fdopen(ifd, "w");
+ FILE *f = fdopen(ifd, "w");
if(!f)
abort();
- // Get the local address
- char *address = get_my_hostname(mesh);
-
// Fill in the details.
fprintf(f, "Name = %s\n", name);
//if(netname)
fprintf(f, "ConnectTo = %s\n", mesh->self->name);
// Copy Broadcast and Mode
- FILE *tc = fopen(mesh->meshlink_conf, "r");
+ snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
+ FILE *tc = fopen(filename, "r");
if(tc) {
char buf[1024];
while(fgets(buf, sizeof buf, tc)) {
}
}
fclose(tc);
+ } else {
+ fprintf(stderr, "Could not create %s: %s\n", filename, strerror(errno));
+ return NULL;
}
fprintf(f, "#---------------------------------------------------------------#\n");
fprintf(f, "Name = %s\n", mesh->self->name);
- char filename2[PATH_MAX];
- snprintf(filename2,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->self->name);
- fcopy(f, filename2);
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->self->name);
+ fcopy(f, filename);
fclose(f);
// Create an URL from the local address, key hash and cookie
}
bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
+ //TODO: think of a better name for this variable, or of a different way to tokenize the invitation URL.
+ char copy[strlen(invitation) + 1];
+ strcpy(copy, invitation);
+ // Split the invitation URL into hostname, port, key hash and cookie.
- // Make sure confbase exists and is accessible.
- if(mkdir(mesh->confbase, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
- return 1;
- }
-
- if(access(mesh->confbase, R_OK | W_OK | X_OK)) {
- fprintf(stderr, "No permission to write in directory %s: %s\n", mesh->confbase, strerror(errno));
- return 1;
- }
-
- // TODO: Either remove or reintroduce netname in meshlink
- // If a netname or explicit configuration directory is specified, check for an existing meshlink.conf.
- //if((mesh->netname || confbasegiven) && !access(meshlink_conf, F_OK)) {
- // fprintf(stderr, "Configuration file %s already exists!\n", meshlink_conf);
- // return 1;
- //}
-
- char *slash = strchr(invitation, '/');
+ char *slash = strchr(copy, '/');
if(!slash)
goto invalid;
if(strlen(slash) != 48)
goto invalid;
- char *address = invitation;
+ char *address = copy;
char *port = NULL;
if(*address == '[') {
address++;
*port++ = 0;
}
- if(!mesh->myport || !*port)
+ if(!port)
port = "655";
if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18))
// Generate a throw-away key for the invitation.
ecdsa_t *key = ecdsa_generate();
if(!key)
- return 1;
+ return false;
char *b64key = ecdsa_get_base64_public_key(key);
+ //Before doing meshlink_join make sure we are not connected to another mesh
+ if ( mesh->threadstarted ){
+ goto invalid;
+ }
+
// Connect to the meshlink daemon mentioned in the URL.
struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
if(!ai)
- return 1;
+ return false;
mesh->sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if(mesh->sock <= 0) {
fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
- return 1;
+ return false;
}
if(connect(mesh->sock, ai->ai_addr, ai->ai_addrlen)) {
fprintf(stderr, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
closesocket(mesh->sock);
- return 1;
+ return false;
}
fprintf(stderr, "Connected to %s port %s...\n", address, port);
// Tell him we have an invitation, and give him our throw-away key.
- int len = snprintf(invitation, sizeof invitation, "0 ?%s %d.%d\n", b64key, PROT_MAJOR, PROT_MINOR);
- if(len <= 0 || len >= sizeof invitation)
- abort();
+
+ mesh->blen = 0;
if(!sendline(mesh->sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
fprintf(stderr, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
closesocket(mesh->sock);
- return 1;
+ return false;
}
char hisname[4096] = "";
if(!recvline(mesh, sizeof mesh->line) || sscanf(mesh->line, "%d %s %d.%d", &code, hisname, &hismajor, &hisminor) < 3 || code != 0 || hismajor != PROT_MAJOR || !check_id(hisname) || !recvline(mesh, sizeof mesh->line) || !rstrip(mesh->line) || sscanf(mesh->line, "%d ", &code) != 1 || code != ACK || strlen(mesh->line) < 3) {
fprintf(stderr, "Cannot read greeting from peer\n");
closesocket(mesh->sock);
- return 1;
+ return false;
}
// Check if the hash of the key he gave us matches the hash in the URL.
char *fingerprint = mesh->line + 2;
char hishash[64];
- if(!sha512(fingerprint, strlen(fingerprint), hishash)) {
+ if(sha512(fingerprint, strlen(fingerprint), hishash)) {
fprintf(stderr, "Could not create hash\n%s\n", mesh->line + 2);
- return 1;
+ return false;
}
if(memcmp(hishash, mesh->hash, 18)) {
fprintf(stderr, "Peer has an invalid key!\n%s\n", mesh->line + 2);
- return 1;
+ return false;
}
ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
if(!hiskey)
- return 1;
+ return false;
// Start an SPTPS session
if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, "meshlink invitation", 15, invitation_send, invitation_receive))
- return 1;
+ return false;
// Feed rest of input buffer to SPTPS
if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen))
- return 1;
+ return false;
+
+ int len;
while((len = recv(mesh->sock, mesh->line, sizeof mesh->line, 0))) {
if(len < 0) {
if(errno == EINTR)
continue;
fprintf(stderr, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
- return 1;
+ return false;
}
if(!sptps_receive_data(&mesh->sptps, mesh->line, len))
- return 1;
+ return false;
}
sptps_stop(&mesh->sptps);
return true;
invalid:
- fprintf(stderr, "Invalid invitation URL.\n");
+ fprintf(stderr, "Invalid invitation URL or you are already connected to a Mesh ?\n");
return false;
}
char *meshlink_export(meshlink_handle_t *mesh) {
- return NULL;
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->self->name);
+ FILE *f = fopen(filename, "r");
+ if(!f) {
+ fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+ return NULL;
+ }
+
+ fseek(f, 0, SEEK_END);
+ int fsize = ftell(f);
+ rewind(f);
+
+ size_t len = fsize + 9 + strlen(mesh->self->name);
+ char *buf = xmalloc(len);
+ snprintf(buf, len, "Name = %s\n", mesh->self->name);
+ if(fread(buf + len - fsize - 1, fsize, 1, f) != 1) {
+ fprintf(stderr, "Error reading from %s: %s\n", filename, strerror(errno));
+ fclose(f);
+ return NULL;
+ }
+
+ fclose(f);
+ buf[len - 1] = 0;
+ return buf;
}
bool meshlink_import(meshlink_handle_t *mesh, const char *data) {
- return false;
+ if(strncmp(data, "Name = ", 7)) {
+ fprintf(stderr, "Invalid data\n");
+ return false;
+ }
+
+ char *end = strchr(data + 7, '\n');
+ if(!end) {
+ fprintf(stderr, "Invalid data\n");
+ return false;
+ }
+
+ int len = end - (data + 7);
+ char name[len + 1];
+ memcpy(name, data + 7, len);
+ name[len] = 0;
+ if(!check_id(name)) {
+ fprintf(stderr, "Invalid Name\n");
+ return false;
+ }
+
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ if(!access(filename, F_OK)) {
+ fprintf(stderr, "File %s already exists, not importing\n", filename);
+ return false;
+ }
+
+ if(errno != ENOENT) {
+ fprintf(stderr, "Error accessing %s: %s\n", filename, strerror(errno));
+ return false;
+ }
+
+ FILE *f = fopen(filename, "w");
+ if(!f) {
+ fprintf(stderr, "Could not create %s: %s\n", filename, strerror(errno));
+ return false;
+ }
+
+ fwrite(end + 1, strlen(end + 1), 1, f);
+ fclose(f);
+
+ load_all_nodes(mesh);
+
+ return true;
}
void meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ node_t *n;
+ n = (node_t*)node;
+ n->status.blacklisted=true;
+ fprintf(stderr, "Blacklisted %s.\n",node->name);
+
+ //Make blacklisting persistent in the config file
+ append_config_file(mesh, n->name, "blacklisted", "yes");
+ return;
+
}
static void __attribute__((constructor)) meshlink_init(void) {
projects / meshlink / blobdiff