with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define VAR_SERVER 1 /* Should be in tinc.conf */
+#define VAR_SERVER 1 /* Should be in meshlink.conf */
#define VAR_HOST 2 /* Can be in host config file */
#define VAR_MULTIPLE 4 /* Multiple statements allowed */
#define VAR_OBSOLETE 8 /* Should not be used anymore */
#define VAR_SAFE 16 /* Variable is safe when accepting invitations */
+#define MAX_ADDRESS_LENGTH 45 /* Max length of an (IPv6) address */
+#define MAX_PORT_LENGTH 5 /* 0-65535 */
typedef struct {
const char *name;
int type;
#include "crypto.h"
#include "ecdsagen.h"
+#include "logger.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"
+#include "discovery.h"
-static char meshlink_conf[PATH_MAX];
-static char hosts_dir[PATH_MAX];
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
+
+static pthread_mutex_t global_mutex;
-static int sock;
-static sptps_t sptps;
-static char cookie[18], hash[18];
-static char *data = NULL;
-static size_t thedatalen = 0;
-static bool success = false;
-static char line[4096];
-static char buffer[4096];
-static size_t blen = 0;
+__thread meshlink_errno_t meshlink_errno;
+meshlink_log_cb_t global_log_cb;
+meshlink_log_level_t global_log_level;
+//TODO: this can go away completely
const var_t variables[] = {
/* Server configuration */
{"AddressFamily", VAR_SERVER},
{NULL, 0}
};
+static bool fcopy(FILE *out, const char *filename) {
+ FILE *in = fopen(filename, "r");
+ if(!in) {
+ logger(NULL, MESHLINK_ERROR, "Could not open %s: %s\n", filename, strerror(errno));
+ return false;
+ }
+
+ char buf[1024];
+ size_t len;
+ while((len = fread(buf, 1, sizeof buf, in)))
+ fwrite(buf, len, 1, out);
+ 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))
+ return;
+
+ FILE *f = fopen(filename, "r");
+ if(!f)
+ return;
+
+ while(fgets(line, sizeof line, f)) {
+ if(!rstrip(line))
+ continue;
+ char *p = line, *q;
+ p += strcspn(p, "\t =");
+ if(!*p)
+ continue;
+ q = p + strspn(p, "\t ");
+ if(*q == '=')
+ q += 1 + strspn(q + 1, "\t ");
+ *p = 0;
+ p = q + strcspn(q, "\t ");
+ if(*p)
+ *p++ = 0;
+ p += strspn(p, "\t ");
+ p[strcspn(p, "\t ")] = 0;
+
+ if(!*port && !strcasecmp(line, "Port")) {
+ *port = xstrdup(q);
+ } else if(!*hostname && !strcasecmp(line, "Address")) {
+ *hostname = xstrdup(q);
+ if(*p) {
+ free(*port);
+ *port = xstrdup(p);
+ }
+ }
+
+ if(*hostname && *port)
+ break;
+ }
+
+ fclose(f);
+}
+static char *get_my_hostname(meshlink_handle_t* mesh) {
+ char *hostname = NULL;
+ char *port = NULL;
+ char *hostport = NULL;
+ char *name = mesh->self->name;
+ char filename[PATH_MAX] = "";
+ char line[4096];
+ FILE *f;
+
+ // Use first Address statement in own host config file
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ scan_for_hostname(filename, &hostname, &port);
+
+ if(hostname)
+ goto done;
+
+ // If that doesn't work, guess externally visible hostname
+ logger(mesh, MESHLINK_DEBUG, "Trying to discover externally visible hostname...\n");
+ struct addrinfo *ai = str2addrinfo("meshlink.io", "80", SOCK_STREAM);
+ struct addrinfo *aip = ai;
+ static const char request[] = "GET http://www.meshlink.io/host.cgi HTTP/1.0\r\n\r\n";
+
+ while(aip) {
+ int s = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
+ if(s >= 0) {
+ if(connect(s, aip->ai_addr, aip->ai_addrlen)) {
+ closesocket(s);
+ s = -1;
+ }
+ }
+ if(s >= 0) {
+ send(s, request, sizeof request - 1, 0);
+ int len = recv(s, line, sizeof line - 1, MSG_WAITALL);
+ if(len > 0) {
+ line[len] = 0;
+ if(line[len - 1] == '\n')
+ line[--len] = 0;
+ char *p = strrchr(line, '\n');
+ if(p && p[1])
+ hostname = xstrdup(p + 1);
+ }
+ closesocket(s);
+ if(hostname)
+ break;
+ }
+ aip = aip->ai_next;
+ continue;
+ }
+
+ if(ai)
+ freeaddrinfo(ai);
+
+ // Check that the hostname is reasonable
+ if(hostname) {
+ for(char *p = hostname; *p; p++) {
+ if(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')
+ continue;
+ // If not, forget it.
+ free(hostname);
+ hostname = NULL;
+ break;
+ }
+ }
+
+ if(!hostname)
+ return NULL;
+
+ f = fopen(filename, "a");
+ if(f) {
+ fprintf(f, "\nAddress = %s\n", hostname);
+ fclose(f);
+ } else {
+ logger(mesh, MESHLINK_DEBUG, "Could not append Address to %s: %s\n", filename, strerror(errno));
+ }
+
+done:
+ if(port) {
+ if(strchr(hostname, ':'))
+ xasprintf(&hostport, "[%s]:%s", hostname, port);
+ else
+ xasprintf(&hostport, "%s:%s", hostname, port);
+ } else {
+ if(strchr(hostname, ':'))
+ xasprintf(&hostport, "[%s]", hostname);
+ else
+ hostport = xstrdup(hostname);
+ }
+
+ free(hostname);
+ free(port);
+ return hostport;
+}
+
static char *get_line(const char **data) {
if(!data || !*data)
return NULL;
const char *end = strchr(*data, '\n');
size_t len = end ? end - *data : strlen(*data);
if(len >= sizeof line) {
- fprintf(stderr, "Maximum line length exceeded!\n");
+ logger(NULL, MESHLINK_ERROR, "Maximum line length exceeded!\n");
return NULL;
}
if(len && !isprint(**data))
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 finalize_join(meshlink_handle_t *mesh) {
- char *name = xstrdup(get_value(data, "Name"));
- if(!name) {
- fprintf(stderr, "No Name found in invitation!\n");
+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) {
+ freeaddrinfo(ai);
+ return false;
+ }
+ int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+ closesocket(fd);
+ if(result) {
+ freeaddrinfo(ai);
+ return false;
+ }
+ ai = ai->ai_next;
}
- if(!check_id(name)) {
- fprintf(stderr, "Invalid Name found in invitation: %s!\n", name);
- return false;
+ freeaddrinfo(ai);
+ return true;
+}
+
+static int check_port(meshlink_handle_t *mesh) {
+ for(int i = 0; i < 1000; 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) {
+ logger(mesh, MESHLINK_DEBUG, "Please change MeshLink's Port manually.\n");
+ return 0;
+ }
+
+ fprintf(f, "Port = %d\n", port);
+ fclose(f);
+ return port;
+ }
}
- if(mkdir(mesh->confbase, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Please change MeshLink's Port manually.\n");
+ return 0;
+}
+
+static bool finalize_join(meshlink_handle_t *mesh) {
+ char *name = xstrdup(get_value(mesh->data, "Name"));
+ if(!name) {
+ logger(mesh, MESHLINK_DEBUG, "No Name found in invitation!\n");
return false;
}
- if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
+ if(!check_id(name)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation: %s!\n", name);
return false;
}
- FILE *f = fopen(meshlink_conf, "w");
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
+
+ FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", meshlink_conf, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "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", 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));
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
+ fclose(f);
return false;
}
- // Filter first chunk on approved keywords, split between tinc.conf and hosts/Name
+ // Filter first chunk on approved keywords, split between meshlink.conf and hosts/Name
// Other chunks go unfiltered to their respective host config files
- const char *p = data;
+ const char *p = mesh->data;
char *l, *value;
while((l = get_line(&p))) {
else if(!strcasecmp(l, "NetName"))
continue;
- // Check the list of known variables
+ // Check the list of known variables //TODO: most variables will not be available in meshlink, only name and key will be absolutely necessary
bool found = false;
int i;
for(i = 0; variables[i].name; i++) {
// Ignore unknown and unsafe variables
if(!found) {
- fprintf(stderr, "Ignoring unknown variable '%s' in invitation.\n", l);
+ logger(mesh, MESHLINK_DEBUG, "Ignoring unknown variable '%s' in invitation.\n", l);
continue;
} else if(!(variables[i].type & VAR_SAFE)) {
- fprintf(stderr, "Ignoring unsafe variable '%s' in invitation.\n", l);
+ logger(mesh, MESHLINK_DEBUG, "Ignoring unsafe variable '%s' in invitation.\n", l);
continue;
}
while(l && !strcasecmp(l, "Name")) {
if(!check_id(value)) {
- fprintf(stderr, "Invalid Name found in invitation.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation.\n");
return false;
}
if(!strcmp(value, name)) {
- fprintf(stderr, "Secondary chunk would overwrite our own host config file.\n");
+ logger(mesh, MESHLINK_DEBUG, "Secondary chunk would overwrite our own host config file.\n");
return false;
}
- snprintf(filename,PATH_MAX, "%s" SLASH "%s", hosts_dir, value);
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, value);
f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
return false;
}
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);
- sptps_send_record(&sptps, 1, b64key, strlen(b64key));
+ fclose(fh);
+
+ sptps_send_record(&(mesh->sptps), 1, b64key, strlen(b64key));
free(b64key);
- ecdsa_free(key);
+ free(mesh->self->name);
+ free(mesh->self->connection->name);
+ mesh->self->name = xstrdup(name);
+ mesh->self->connection->name = name;
- check_port(name);
+ logger(mesh, MESHLINK_DEBUG, "Configuration stored in: %s\n", mesh->confbase);
- 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(sock, data, len, 0);
+ int result = send(mesh->sock, data, len, 0);
if(result == -1 && errno == EINTR)
continue;
else if(result <= 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 sptps_send_record(&sptps, 0, cookie, sizeof cookie);
+ return sptps_send_record(&(mesh->sptps), 0, mesh->cookie, sizeof mesh->cookie);
case 0:
- data = xrealloc(data, thedatalen + len + 1);
- memcpy(data + thedatalen, msg, len);
- thedatalen += len;
- data[thedatalen] = 0;
+ mesh->data = xrealloc(mesh->data, mesh->thedatalen + len + 1);
+ memcpy(mesh->data + mesh->thedatalen, msg, len);
+ mesh->thedatalen += len;
+ mesh->data[mesh->thedatalen] = 0;
break;
case 1:
- return finalize_join(NULL);//TODO: wrong, we have to pass the mesh handler here, but how ?
+ return finalize_join(mesh);
case 2:
- fprintf(stderr, "Invitation succesfully accepted.\n");
- shutdown(sock, SHUT_RDWR);
- success = true;
+ logger(mesh, MESHLINK_DEBUG, "Invitation succesfully accepted.\n");
+ shutdown(mesh->sock, SHUT_RDWR);
+ mesh->success = true;
break;
default:
return true;
}
-static bool recvline(int fd, char *line, size_t len) {
+static bool recvline(meshlink_handle_t* mesh, size_t len) {
char *newline = NULL;
- if(!fd)
+ if(!mesh->sock)
abort();
- while(!(newline = memchr(buffer, '\n', blen))) {
- int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
+ while(!(newline = memchr(mesh->buffer, '\n', mesh->blen))) {
+ int result = recv(mesh->sock, mesh->buffer + mesh->blen, sizeof mesh->buffer - mesh->blen, 0);
if(result == -1 && errno == EINTR)
continue;
else if(result <= 0)
return false;
- blen += result;
+ mesh->blen += result;
}
- if(newline - buffer >= len)
+ if(newline - mesh->buffer >= len)
return false;
- len = newline - buffer;
+ len = newline - mesh->buffer;
- memcpy(line, buffer, len);
- line[len] = 0;
- memmove(buffer, newline + 1, blen - len - 1);
- blen -= len + 1;
+ memcpy(mesh->line, mesh->buffer, len);
+ mesh->line[len] = 0;
+ memmove(mesh->buffer, newline + 1, mesh->blen - len - 1);
+ mesh->blen -= len + 1;
return true;
}
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",
+ [MESHLINK_EINVAL] = "Invalid argument",
[MESHLINK_ENOMEM] = "Out of memory",
[MESHLINK_ENOENT] = "No such node",
+ [MESHLINK_EEXIST] = "Node already exists",
+ [MESHLINK_EINTERNAL] = "Internal error",
+ [MESHLINK_ERESOLV] = "Could not resolve hostname",
+ [MESHLINK_ESTORAGE] = "Storage error",
+ [MESHLINK_ENETWORK] = "Network error",
+ [MESHLINK_EPEER] = "Error communicating with peer",
};
-const char *meshlink_strerror(meshlink_errno_t errno) {
- return errstr[errno];
+const char *meshlink_strerror(meshlink_errno_t err) {
+ if(err < 0 || err >= sizeof errstr / sizeof *errstr)
+ return "Invalid error code";
+ return errstr[err];
}
static bool ecdsa_keygen(meshlink_handle_t *mesh) {
FILE *f;
char pubname[PATH_MAX], privname[PATH_MAX];
- fprintf(stderr, "Generating ECDSA keypair:\n");
+ logger(mesh, MESHLINK_DEBUG, "Generating ECDSA keypair:\n");
if(!(key = ecdsa_generate())) {
- fprintf(stderr, "Error during key generation!\n");
+ logger(mesh, MESHLINK_DEBUG, "Error during key generation!\n");
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
} else
- fprintf(stderr, "Done.\n");
+ logger(mesh, MESHLINK_DEBUG, "Done.\n");
snprintf(privname, sizeof privname, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
f = fopen(privname, "w");
- if(!f)
+ if(!f) {
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
+ }
#ifdef HAVE_FCHMOD
fchmod(fileno(f), 0600);
#endif
if(!ecdsa_write_pem_private_key(key, f)) {
- fprintf(stderr, "Error writing private key!\n");
+ logger(mesh, MESHLINK_DEBUG, "Error writing private key!\n");
ecdsa_free(key);
fclose(f);
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
}
fclose(f);
-
snprintf(pubname, sizeof pubname, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->name);
f = fopen(pubname, "a");
- if(!f)
+ if(!f) {
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
+ }
char *pubkey = ecdsa_get_base64_public_key(key);
fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
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));
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
- snprintf(hosts_dir, sizeof hosts_dir, "%s" SLASH "hosts", mesh->confbase);
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts", mesh->confbase);
- if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
+ if(mkdir(filename, 0777) && errno != EEXIST) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
- snprintf(meshlink_conf, sizeof meshlink_conf, "%s" SLASH "meshlink.conf", mesh->confbase);
+ snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
- if(!access(meshlink_conf, F_OK)) {
- fprintf(stderr, "Configuration file %s already exists!\n", meshlink_conf);
+ if(!access(filename, F_OK)) {
+ logger(mesh, MESHLINK_DEBUG, "Configuration file %s already exists!\n", filename);
+ meshlink_errno = MESHLINK_EEXIST;
return false;
}
- FILE *f = fopen(meshlink_conf, "w");
+ FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", meshlink_conf, strerror(errno));
- return 1;
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return false;
}
fprintf(f, "Name = %s\n", mesh->name);
fclose(f);
- if(!ecdsa_keygen(mesh))
+ if(!ecdsa_keygen(mesh)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
+ }
check_port(mesh);
return true;
}
-meshlink_handle_t *meshlink_open(const char *confbase, const char *name) {
+meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char* appname, dev_class_t devclass) {
+ return meshlink_open_with_size(confbase, name, appname, devclass, sizeof(meshlink_handle_t));
+}
+
+meshlink_handle_t *meshlink_open_with_size(const char *confbase, const char *name, const char* appname, dev_class_t devclass, size_t size) {
+
// Validate arguments provided by the application
+ bool usingname = false;
+
+ logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
if(!confbase || !*confbase) {
- fprintf(stderr, "No confbase given!\n");
+ logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
- if(!name || !*name) {
- fprintf(stderr, "No name given!\n");
+ if(!appname || !*appname) {
+ logger(NULL, MESHLINK_ERROR, "No appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
- if(!check_id(name)) {
- fprintf(stderr, "Invalid name given!\n");
+ if(!name || !*name) {
+ logger(NULL, MESHLINK_ERROR, "No name given!\n");
+ //return NULL;
+ }
+ else { //check name only if there is a name != NULL
+
+ if(!check_id(name)) {
+ logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ } else { usingname = true;}
+ }
+
+ if(devclass < 0 || devclass > _DEV_CLASS_MAX) {
+ logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
- meshlink_handle_t *mesh = xzalloc(sizeof *mesh);
+ meshlink_handle_t *mesh = xzalloc(size);
mesh->confbase = xstrdup(confbase);
- mesh->name = xstrdup(name);
+ mesh->appname = xstrdup(appname);
+ mesh->devclass = devclass;
+ if (usingname) mesh->name = xstrdup(name);
+
+ // initialize mutex
+ pthread_mutexattr_t attr;
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+ pthread_mutex_init(&(mesh->mesh_mutex), &attr);
+
+ mesh->threadstarted = false;
event_loop_init(&mesh->loop);
mesh->loop.data = mesh;
- // TODO: should be set by a function.
- mesh->debug_level = 5;
-
// Check whether meshlink.conf already exists
char filename[PATH_MAX];
if(access(filename, R_OK)) {
if(errno == ENOENT) {
// If not, create it
- meshlink_setup(mesh);
+ if(!meshlink_setup(mesh)) {
+ // meshlink_errno is set by meshlink_setup()
+ return NULL;
+ }
} else {
- fprintf(stderr, "Cannot not read from %s: %s\n", filename, strerror(errno));
- return meshlink_close(mesh), NULL;
+ logger(NULL, MESHLINK_ERROR, "Cannot not read from %s: %s\n", filename, strerror(errno));
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return NULL;
}
}
init_configuration(&mesh->config);
- if(!read_server_config(mesh))
- return meshlink_close(mesh), NULL;
+ if(!read_server_config(mesh)) {
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return 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
- if(!setup_network(mesh))
- return meshlink_close(mesh), NULL;
+ if(!setup_network(mesh)) {
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ENETWORK;
+ return NULL;
+ }
+ logger(NULL, MESHLINK_DEBUG, "meshlink_open returning\n");
return mesh;
}
-void *meshlink_main_loop(void *arg) {
+static void *meshlink_main_loop(void *arg) {
meshlink_handle_t *mesh = arg;
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
try_outgoing_connections(mesh);
+ logger(mesh, MESHLINK_DEBUG, "Starting main_loop...\n");
main_loop(mesh);
+ logger(mesh, MESHLINK_DEBUG, "main_loop returned.\n");
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
bool meshlink_start(meshlink_handle_t *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ logger(mesh, MESHLINK_DEBUG, "meshlink_start called\n");
+
// TODO: open listening sockets first
+ //Check that a valid name is set
+ if(!mesh->name ) {
+ logger(mesh, MESHLINK_DEBUG, "No name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
// Start the main thread
if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
- fprintf(stderr, "Could not start thread: %s\n", strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
memset(&mesh->thread, 0, sizeof mesh->thread);
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
+ mesh->threadstarted=true;
+
+ discovery_start(mesh);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
void meshlink_stop(meshlink_handle_t *mesh) {
- // TODO: close the listening sockets to signal the main thread to shut down
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
- // Wait for the main thread to finish
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ logger(mesh, MESHLINK_DEBUG, "meshlink_stop called\n");
+ // Stop discovery
+ discovery_stop(mesh);
+
+ // Shut down a listening socket to signal the main thread to shut down
+
+ listen_socket_t *s = &mesh->listen_socket[0];
+ shutdown(s->tcp.fd, SHUT_RDWR);
+
+ // Wait for the main thread to finish
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
pthread_join(mesh->thread, NULL);
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ mesh->threadstarted = false;
+
+ // Fix the socket
+
+ closesocket(s->tcp.fd);
+ io_del(&mesh->loop, &s->tcp);
+ s->tcp.fd = setup_listen_socket(&s->sa);
+ if(s->tcp.fd < 0)
+ logger(mesh, MESHLINK_ERROR, "Could not repair listenen socket!");
+ else
+ io_add(&mesh->loop, &s->tcp, handle_new_meta_connection, s, s->tcp.fd, IO_READ);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_close(meshlink_handle_t *mesh) {
+ if(!mesh || !mesh->confbase) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ // lock is not released after this
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
// Close and free all resources used.
close_network_connections(mesh);
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
+ logger(mesh, MESHLINK_INFO, "Terminating");
exit_configuration(&mesh->config);
event_loop_exit(&mesh->loop);
+
+#ifdef HAVE_MINGW
+ if(mesh->confbase)
+ WSACleanup();
+#endif
+
+ ecdsa_free(mesh->invitation_key);
+
+ free(mesh->name);
+ free(mesh->appname);
+ free(mesh->confbase);
+ pthread_mutex_destroy(&(mesh->mesh_mutex));
+
+ memset(mesh, 0, sizeof *mesh);
+
+ free(mesh);
}
void meshlink_set_receive_cb(meshlink_handle_t *mesh, meshlink_receive_cb_t cb) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
mesh->receive_cb = cb;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_set_node_status_cb(meshlink_handle_t *mesh, meshlink_node_status_cb_t cb) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
mesh->node_status_cb = cb;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_set_log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, meshlink_log_cb_t cb) {
- mesh->log_cb = cb;
- mesh->log_level = level;
+ if(mesh) {
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ mesh->log_cb = cb;
+ mesh->log_level = cb ? level : 0;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ } else {
+ global_log_cb = cb;
+ global_log_level = cb ? level : 0;
+ }
}
-bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, unsigned int len) {
- vpn_packet_t packet;
- meshlink_packethdr_t *hdr = (meshlink_packethdr_t *)packet.data;
- if (sizeof(meshlink_packethdr_t) + len > MAXSIZE) {
- //log something
+bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
+ if(!mesh || !destination) {
+ meshlink_errno = MESHLINK_EINVAL;
return false;
}
- packet.probe = false;
- memset(hdr, 0, sizeof *hdr);
- memcpy(hdr->destination, destination->name, sizeof hdr->destination);
- memcpy(hdr->source, mesh->self->name, sizeof hdr->source);
+ if(!len)
+ return true;
- packet.len = sizeof *hdr + len;
- memcpy(packet.data + sizeof *hdr, data, len);
+ if(!data) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
- mesh->self->in_packets++;
- mesh->self->in_bytes += packet.len;
- route(mesh, mesh->self, &packet);
- return false;
-}
+ pthread_mutex_lock(&(mesh->mesh_mutex));
-meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
- return (meshlink_node_t *)lookup_node(mesh, name);
- return 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;
+ if(!meshlink_queue_push(&mesh->outpacketqueue, packet_in_queue)) {
+ free(packet_in_queue);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ //notify event loop
+ signal_trigger(&(mesh->loop),&(mesh->datafromapp));
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return true;
}
-size_t meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t nmemb) {
- return 0;
+void meshlink_send_from_queue(event_loop_t* el,meshlink_handle_t *mesh) {
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ vpn_packet_t packet;
+ meshlink_packethdr_t *hdr = (meshlink_packethdr_t *)packet.data;
+
+ outpacketqueue_t* p = meshlink_queue_pop(&mesh->outpacketqueue);
+ if(!p)
+ {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+ }
+
+ if (sizeof(meshlink_packethdr_t) + p->len > MAXSIZE) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ //log something
+ return;
+ }
+
+ packet.probe = false;
+ memset(hdr, 0, sizeof *hdr);
+ memcpy(hdr->destination, p->destination->name, sizeof hdr->destination);
+ memcpy(hdr->source, mesh->self->name, sizeof hdr->source);
+
+ 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);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return ;
}
-char *meshlink_sign(meshlink_handle_t *mesh, const char *data, size_t len) {
- return NULL;
+ssize_t meshlink_get_pmtu(meshlink_handle_t *mesh, meshlink_node_t *destination) {
+ if(!mesh || !destination) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)destination;
+ if(!n->status.reachable) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return 0;
+
+ }
+ else if(n->mtuprobes > 30 && n->minmtu) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return n->minmtu;
+ }
+ else {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return MTU;
+ }
}
-bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const char *data, size_t len, const char *signature) {
- return false;
+char *meshlink_get_fingerprint(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)node;
+
+ if(!node_read_ecdsa_public_key(mesh, n) || !n->ecdsa) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ char *fingerprint = ecdsa_get_base64_public_key(n->ecdsa);
+
+ if(!fingerprint)
+ meshlink_errno = MESHLINK_EINTERNAL;
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return fingerprint;
}
-char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
- return NULL;
+meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
+ if(!mesh || !name) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ meshlink_node_t *node = NULL;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ node = (meshlink_node_t *)lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return node;
}
-bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
+meshlink_node_t **meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t *nmemb) {
+ if(!mesh || !nmemb || (*nmemb && !nodes)) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+ meshlink_node_t **result;
- // 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;
+ //lock mesh->nodes
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ *nmemb = mesh->nodes->count;
+ result = realloc(nodes, *nmemb * sizeof *nodes);
+
+ if(result) {
+ meshlink_node_t **p = result;
+ for splay_each(node_t, n, mesh->nodes)
+ *p++ = (meshlink_node_t *)n;
+ } else {
+ *nmemb = 0;
+ free(nodes);
+ meshlink_errno = MESHLINK_ENOMEM;
+ }
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return result;
+}
+
+bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
+ if(!mesh || !data || !len || !signature || !siglen) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(*siglen < MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ if(!ecdsa_sign(mesh->self->connection->ecdsa, data, len, signature)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ *siglen = MESHLINK_SIGLEN;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return true;
+}
+
+bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
+ if(!mesh || !data || !len || !signature) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(siglen != MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
}
- 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;
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ bool rval = false;
+
+ struct node_t *n = (struct node_t *)source;
+ node_read_ecdsa_public_key(mesh, n);
+ if(!n->ecdsa) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ rval = false;
+ } else {
+ rval = ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
}
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return rval;
+}
- // 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;
- //}
+static bool refresh_invitation_key(meshlink_handle_t *mesh) {
+ char filename[PATH_MAX];
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations", mesh->confbase);
+ if(mkdir(filename, 0700) && errno != EEXIST) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
- char *slash = strchr(invitation, '/');
+ // Count the number of valid invitations, clean up old ones
+ DIR *dir = opendir(filename);
+ if(!dir) {
+ logger(mesh, MESHLINK_DEBUG, "Could not read directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ errno = 0;
+ int count = 0;
+ struct dirent *ent;
+ time_t deadline = time(NULL) - 604800; // 1 week in the past
+
+ while((ent = readdir(dir))) {
+ if(strlen(ent->d_name) != 24)
+ continue;
+ char invname[PATH_MAX];
+ struct stat st;
+ snprintf(invname, sizeof invname, "%s" SLASH "%s", filename, ent->d_name);
+ if(!stat(invname, &st)) {
+ if(mesh->invitation_key && deadline < st.st_mtime)
+ count++;
+ else
+ unlink(invname);
+ } else {
+ logger(mesh, MESHLINK_DEBUG, "Could not stat %s: %s\n", invname, strerror(errno));
+ errno = 0;
+ }
+ }
+
+ if(errno) {
+ logger(mesh, MESHLINK_DEBUG, "Error while reading directory %s: %s\n", filename, strerror(errno));
+ closedir(dir);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ closedir(dir);
+
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
+
+ // Remove the key if there are no outstanding invitations.
+ if(!count) {
+ unlink(filename);
+ if(mesh->invitation_key) {
+ ecdsa_free(mesh->invitation_key);
+ mesh->invitation_key = NULL;
+ }
+ }
+
+ if(mesh->invitation_key) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return true;
+ }
+
+ // Create a new key if necessary.
+ FILE *f = fopen(filename, "r");
+ if(!f) {
+ if(errno != ENOENT) {
+ logger(mesh, MESHLINK_DEBUG, "Could not read %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ mesh->invitation_key = ecdsa_generate();
+ if(!mesh->invitation_key) {
+ logger(mesh, MESHLINK_DEBUG, "Could not generate a new key!\n");
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+ f = fopen(filename, "w");
+ if(!f) {
+ logger(mesh, MESHLINK_DEBUG, "Could not write %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+ chmod(filename, 0600);
+ ecdsa_write_pem_private_key(mesh->invitation_key, f);
+ fclose(f);
+ } else {
+ mesh->invitation_key = ecdsa_read_pem_private_key(f);
+ fclose(f);
+ if(!mesh->invitation_key) {
+ logger(mesh, MESHLINK_DEBUG, "Could not read private key from %s\n", filename);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ }
+ }
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return mesh->invitation_key;
+}
+
+bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
+ if(!mesh || !address) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ bool rval = false;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ for(const char *p = address; *p; p++) {
+ if(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')
+ continue;
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ rval = append_config_file(mesh, mesh->self->name, "Address", address);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return rval;
+}
+
+char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ // Check validity of the new node's name
+ if(!check_id(name)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid name for node.\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ 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)) {
+ logger(mesh, MESHLINK_DEBUG, "A host config file for %s already exists!\n", name);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ // Ensure no other nodes know about this name
+ if(meshlink_get_node(mesh, name)) {
+ logger(mesh, MESHLINK_DEBUG, "A node with name %s is already known!\n", name);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ // Get the local address
+ char *address = get_my_hostname(mesh);
+ if(!address) {
+ logger(mesh, MESHLINK_DEBUG, "No Address known for ourselves!\n");
+ meshlink_errno = MESHLINK_ERESOLV;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ if(!refresh_invitation_key(mesh)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ char hash[64];
+
+ // Create a hash of the key.
+ char *fingerprint = ecdsa_get_base64_public_key(mesh->invitation_key);
+ sha512(fingerprint, strlen(fingerprint), hash);
+ b64encode_urlsafe(hash, hash, 18);
+
+ // Create a random cookie for this invitation.
+ char cookie[25];
+ randomize(cookie, 18);
+
+ // Create a filename that doesn't reveal the cookie itself
+ char buf[18 + strlen(fingerprint)];
+ char cookiehash[64];
+ memcpy(buf, cookie, 18);
+ memcpy(buf + 18, fingerprint, sizeof buf - 18);
+ sha512(buf, sizeof buf, cookiehash);
+ b64encode_urlsafe(cookiehash, cookiehash, 18);
+
+ b64encode_urlsafe(cookie, cookie, 18);
+
+ free(fingerprint);
+
+ // Create a file containing the details of the invitation.
+ 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) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create invitation file %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+ FILE *f = fdopen(ifd, "w");
+ if(!f)
+ abort();
+
+ // Fill in the details.
+ fprintf(f, "Name = %s\n", name);
+ //if(netname)
+ // fprintf(f, "NetName = %s\n", netname);
+ fprintf(f, "ConnectTo = %s\n", mesh->self->name);
+
+ // Copy Broadcast and Mode
+ 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)) {
+ if((!strncasecmp(buf, "Mode", 4) && strchr(" \t=", buf[4]))
+ || (!strncasecmp(buf, "Broadcast", 9) && strchr(" \t=", buf[9]))) {
+ fputs(buf, f);
+ // Make sure there is a newline character.
+ if(!strchr(buf, '\n'))
+ fputc('\n', f);
+ }
+ }
+ fclose(tc);
+ } else {
+ logger(mesh, MESHLINK_DEBUG, "Could not create %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ fprintf(f, "#---------------------------------------------------------------#\n");
+ fprintf(f, "Name = %s\n", mesh->self->name);
+
+ 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
+ char *url;
+ xasprintf(&url, "%s/%s%s", address, hash, cookie);
+ free(address);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return url;
+}
+
+bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
+ if(!mesh || !invitation) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ //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.
+
+ 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)
- port = "655";
+ if(!port)
+ goto invalid;
- if(!b64decode(slash, hash, 18) || !b64decode(slash + 24, cookie, 18))
+ if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18))
goto invalid;
// Generate a throw-away key for the invitation.
ecdsa_t *key = ecdsa_generate();
- if(!key)
- return 1;
+ if(!key) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ 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;
+ if(!ai) {
+ meshlink_errno = MESHLINK_ERESOLV;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
- sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
- if(sock <= 0) {
- fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
- return 1;
+ mesh->sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ if(mesh->sock <= 0) {
+ logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
+ freeaddrinfo(ai);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
- if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
- fprintf(stderr, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
- closesocket(sock);
- return 1;
+ if(connect(mesh->sock, ai->ai_addr, ai->ai_addrlen)) {
+ logger(mesh, MESHLINK_DEBUG, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
+ closesocket(mesh->sock);
+ freeaddrinfo(ai);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
- fprintf(stderr, "Connected to %s port %s...\n", address, port);
+ freeaddrinfo(ai);
+
+ logger(mesh, MESHLINK_DEBUG, "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();
- if(!sendline(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(sock);
- return 1;
+ mesh->blen = 0;
+
+ if(!sendline(mesh->sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
+ logger(mesh, MESHLINK_DEBUG, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
+ closesocket(mesh->sock);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
+ free(b64key);
+
char hisname[4096] = "";
int code, hismajor, hisminor = 0;
- if(!recvline(sock, line, sizeof line) || sscanf(line, "%d %s %d.%d", &code, hisname, &hismajor, &hisminor) < 3 || code != 0 || hismajor != PROT_MAJOR || !check_id(hisname) || !recvline(sock, line, sizeof line) || !rstrip(line) || sscanf(line, "%d ", &code) != 1 || code != ACK || strlen(line) < 3) {
- fprintf(stderr, "Cannot read greeting from peer\n");
- closesocket(sock);
- return 1;
+ 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) {
+ logger(mesh, MESHLINK_DEBUG, "Cannot read greeting from peer\n");
+ closesocket(mesh->sock);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
// Check if the hash of the key he gave us matches the hash in the URL.
- char *fingerprint = line + 2;
+ char *fingerprint = mesh->line + 2;
char hishash[64];
- if(!sha512(fingerprint, strlen(fingerprint), hishash)) {
- fprintf(stderr, "Could not create hash\n%s\n", line + 2);
- return 1;
+ if(sha512(fingerprint, strlen(fingerprint), hishash)) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create hash\n%s\n", mesh->line + 2);
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
- if(memcmp(hishash, hash, 18)) {
- fprintf(stderr, "Peer has an invalid key!\n%s\n", line + 2);
- return 1;
+ if(memcmp(hishash, mesh->hash, 18)) {
+ logger(mesh, MESHLINK_DEBUG, "Peer has an invalid key!\n%s\n", mesh->line + 2);
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
- if(!hiskey)
- return 1;
+ if(!hiskey) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
// Start an SPTPS session
- if(!sptps_start(&sptps, NULL, true, false, key, hiskey, "meshlink invitation", 15, invitation_send, invitation_receive))
- return 1;
+ if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, "meshlink invitation", 15, invitation_send, invitation_receive)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
// Feed rest of input buffer to SPTPS
- if(!sptps_receive_data(&sptps, buffer, blen))
- return 1;
+ if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen)) {
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ int len;
- while((len = recv(sock, line, sizeof line, 0))) {
+ 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;
+ logger(mesh, MESHLINK_DEBUG, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
}
- if(!sptps_receive_data(&sptps, line, len))
- return 1;
+ if(!sptps_receive_data(&mesh->sptps, mesh->line, len)) {
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
}
- sptps_stop(&sptps);
+ sptps_stop(&mesh->sptps);
ecdsa_free(hiskey);
ecdsa_free(key);
- closesocket(sock);
+ closesocket(mesh->sock);
- if(!success) {
- fprintf(stderr, "Connection closed by peer, invitation cancelled.\n");
+ if(!mesh->success) {
+ logger(mesh, MESHLINK_DEBUG, "Connection closed by peer, invitation cancelled.\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
invalid:
- fprintf(stderr, "Invalid invitation URL.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL or you are already connected to a Mesh ?\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
char *meshlink_export(meshlink_handle_t *mesh) {
- return NULL;
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ 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) {
+ logger(mesh, MESHLINK_DEBUG, "Could not open %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ 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) {
+ logger(mesh, MESHLINK_DEBUG, "Error reading from %s: %s\n", filename, strerror(errno));
+ fclose(f);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ fclose(f);
+ buf[len - 1] = 0;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ return buf;
}
bool meshlink_import(meshlink_handle_t *mesh, const char *data) {
- return false;
+ if(!mesh || !data) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ if(strncmp(data, "Name = ", 7)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ char *end = strchr(data + 7, '\n');
+ if(!end) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ int len = end - (data + 7);
+ char name[len + 1];
+ memcpy(name, data + 7, len);
+ name[len] = 0;
+ if(!check_id(name)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ if(!access(filename, F_OK)) {
+ logger(mesh, MESHLINK_DEBUG, "File %s already exists, not importing\n", filename);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ if(errno != ENOENT) {
+ logger(mesh, MESHLINK_DEBUG, "Error accessing %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ FILE *f = fopen(filename, "w");
+ if(!f) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ fwrite(end + 1, strlen(end + 1), 1, f);
+ fclose(f);
+
+ load_all_nodes(mesh);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return true;
}
void meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n;
+ n = (node_t*)node;
+ n->status.blacklisted=true;
+ logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n",node->name);
+
+ //Make blacklisting persistent in the config file
+ append_config_file(mesh, n->name, "blacklisted", "yes");
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+}
+
+void meshlink_whitelist(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)node;
+ n->status.blacklisted = false;
+
+ //TODO: remove blacklisted = yes from the config file
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+}
+
+/* Hint that a hostname may be found at an address
+ * See header file for detailed comment.
+ */
+void meshlink_hint_address(meshlink_handle_t *mesh, meshlink_node_t *node, const struct sockaddr *addr) {
+ if(!mesh || !node || !addr)
+ return;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ char *host = NULL, *port = NULL, *str = NULL;
+ sockaddr2str((const sockaddr_t *)addr, &host, &port);
+
+ if(host && port) {
+ xasprintf(&str, "%s %s", host, port);
+ append_config_file(mesh, node->name, "Address", str);
+ }
+
+ free(str);
+ free(host);
+ free(port);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ // @TODO do we want to fire off a connection attempt right away?
+}
+
+/* Return an array of edges in the current network graph.
+ * Data captures the current state and will not be updated.
+ * Caller must deallocate data when done.
+ */
+meshlink_edge_t **meshlink_get_all_edges_state(meshlink_handle_t *mesh, meshlink_edge_t **edges, size_t *nmemb) {
+ if(!mesh || !nmemb || (*nmemb && !edges)) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ meshlink_edge_t **result = NULL;
+ meshlink_edge_t *copy = NULL;
+ int result_size = 0;
+
+ result_size = mesh->edges->count;
+
+ // if result is smaller than edges, we have to dealloc all the excess meshlink_edge_t
+ if(result_size > *nmemb) {
+ result = realloc(edges, result_size * sizeof (meshlink_edge_t*));
+ } else {
+ result = edges;
+ }
+
+ if(result) {
+ meshlink_edge_t **p = result;
+ int n = 0;
+ for splay_each(edge_t, e, mesh->edges) {
+ // skip edges that do not represent a two-directional connection
+ if((!e->reverse) || (e->reverse->to != e->from)) {
+ result_size--;
+ continue;
+ }
+ n++;
+ // the first *nmemb members of result can be re-used
+ if(n > *nmemb) {
+ copy = xzalloc(sizeof *copy);
+ }
+ else {
+ copy = *p;
+ }
+ copy->from = (meshlink_node_t*)e->from;
+ copy->to = (meshlink_node_t*)e->to;
+ copy->address = e->address.storage;
+ copy->options = e->options;
+ copy->weight = e->weight;
+ *p++ = copy;
+ }
+ // shrink result to the actual amount of memory used
+ for(int i = *nmemb; i > result_size; i--) {
+ free(result[i - 1]);
+ }
+ result = realloc(result, result_size * sizeof (meshlink_edge_t*));
+ *nmemb = result_size;
+ } else {
+ *nmemb = 0;
+ free(result);
+ meshlink_errno = MESHLINK_ENOMEM;
+ }
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return result;
}
static void __attribute__((constructor)) meshlink_init(void) {
static void __attribute__((destructor)) meshlink_exit(void) {
crypto_exit();
}
+
+
+/// Device class traits
+dev_class_traits_t dev_class_traits[_DEV_CLASS_MAX +1] = {
+ { .min_connects = 3, .max_connects = 10000, .edge_weight = 1 }, // DEV_CLASS_BACKBONE
+ { .min_connects = 3, .max_connects = 100, .edge_weight = 3 }, // DEV_CLASS_STATIONARY
+ { .min_connects = 3, .max_connects = 3, .edge_weight = 6 }, // DEV_CLASS_PORTABLE
+ { .min_connects = 1, .max_connects = 1, .edge_weight = 9 }, // DEV_CLASS_UNKNOWN
+};
projects / meshlink / blobdiff