#include "ecdsagen.h"
#include "logger.h"
#include "meshlink_internal.h"
+#include "net.h"
#include "netutl.h"
#include "node.h"
#include "submesh.h"
if(mesh->invitation_addresses) {
for list_each(char, combo, mesh->invitation_addresses) {
hostname[n] = xstrdup(combo);
- char *colon = strchr(hostname[n], ':');
+ char *slash = strrchr(hostname[n], '/');
- if(colon) {
- *colon = 0;
- port[n] = xstrdup(colon + 1);
+ if(slash) {
+ *slash = 0;
+ port[n] = xstrdup(slash + 1);
}
n++;
return hostport;
}
-static bool try_bind(int port) {
+static bool try_bind(meshlink_handle_t *mesh, int port) {
struct addrinfo *ai = NULL;
struct addrinfo hint = {
.ai_flags = AI_PASSIVE,
for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
/* Try to bind to TCP. */
- int tcp_fd = socket(aip->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ int tcp_fd = setup_tcp_listen_socket(mesh, aip);
if(tcp_fd == -1) {
- continue;
- }
-
- int result = bind(tcp_fd, aip->ai_addr, aip->ai_addrlen);
- closesocket(tcp_fd);
-
- if(result) {
if(errno == EADDRINUSE) {
/* If this port is in use for any address family, avoid it. */
success = false;
/* If TCP worked, then we require that UDP works as well. */
- int udp_fd = socket(aip->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+ int udp_fd = setup_udp_listen_socket(mesh, aip);
if(udp_fd == -1) {
+ closesocket(tcp_fd);
success = false;
break;
}
- result = bind(udp_fd, aip->ai_addr, aip->ai_addrlen);
+ closesocket(tcp_fd);
closesocket(udp_fd);
-
- if(result) {
- success = false;
- break;
- }
-
success = true;
}
for(int i = 0; i < 1000; i++) {
int port = 0x1000 + prng(mesh, 0x8000);
- if(try_bind(port)) {
+ if(try_bind(mesh, port)) {
free(mesh->myport);
xasprintf(&mesh->myport, "%d", port);
return port;
return true;
}
-static struct timeval idle(event_loop_t *loop, void *data) {
+static bool timespec_lt(const struct timespec *a, const struct timespec *b) {
+ if(a->tv_sec == b->tv_sec) {
+ return a->tv_nsec < b->tv_nsec;
+ } else {
+ return a->tv_sec < b->tv_sec;
+ }
+}
+
+static struct timespec idle(event_loop_t *loop, void *data) {
(void)loop;
meshlink_handle_t *mesh = data;
- struct timeval t, tmin = {3600, 0};
+ struct timespec t, tmin = {3600, 0};
for splay_each(node_t, n, mesh->nodes) {
if(!n->utcp) {
t = utcp_timeout(n->utcp);
- if(timercmp(&t, &tmin, <)) {
+ if(timespec_lt(&t, &tmin)) {
tmin = t;
}
}
}
bool success = setup_network(mesh);
- add_local_addresses(mesh);
return success ? arg : NULL;
}
#endif // HAVE_SETNS
mesh->submeshes = NULL;
mesh->log_cb = global_log_cb;
mesh->log_level = global_log_level;
+ mesh->packet = xmalloc(sizeof(vpn_packet_t));
randomize(&mesh->prng_state, sizeof(mesh->prng_state));
#endif // HAVE_SETNS
} else {
success = setup_network(mesh);
- add_local_addresses(mesh);
}
if(!success) {
free(mesh->confbase);
free(mesh->config_key);
free(mesh->external_address_url);
+ free(mesh->packet);
ecdsa_free(mesh->private_key);
if(mesh->invitation_addresses) {
pthread_mutex_unlock(&mesh->mutex);
}
-bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
+static bool prepare_packet(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len, vpn_packet_t *packet) {
meshlink_packethdr_t *hdr;
- // Validate arguments
- if(!mesh || !destination || len >= MAXSIZE - sizeof(*hdr)) {
- meshlink_errno = MESHLINK_EINVAL;
- return false;
- }
-
- if(!len) {
- return true;
- }
-
- if(!data) {
+ if(len >= MAXSIZE - sizeof(*hdr)) {
meshlink_errno = MESHLINK_EINVAL;
return false;
}
}
// Prepare the packet
- vpn_packet_t *packet = malloc(sizeof(*packet));
-
- if(!packet) {
- meshlink_errno = MESHLINK_ENOMEM;
- return false;
- }
-
packet->probe = false;
packet->tcp = false;
packet->len = len + sizeof(*hdr);
memcpy(packet->data + sizeof(*hdr), data, len);
+ return true;
+}
+
+static bool meshlink_send_immediate(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
+ assert(mesh);
+ assert(destination);
+ assert(data);
+ assert(len);
+
+ // Prepare the packet
+ if(!prepare_packet(mesh, destination, data, len, mesh->packet)) {
+ return false;
+ }
+
+ // Send it immediately
+ route(mesh, mesh->self, mesh->packet);
+
+ return true;
+}
+
+bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
+ // Validate arguments
+ if(!mesh || !destination) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(!len) {
+ return true;
+ }
+
+ if(!data) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ // Prepare the packet
+ vpn_packet_t *packet = malloc(sizeof(*packet));
+
+ if(!packet) {
+ meshlink_errno = MESHLINK_ENOMEM;
+ return false;
+ }
+
+ if(!prepare_packet(mesh, destination, data, len, packet)) {
+ free(packet);
+ }
+
// Queue it
if(!meshlink_queue_push(&mesh->outpacketqueue, packet)) {
free(packet);
return false;
}
+ logger(mesh, MESHLINK_DEBUG, "Adding packet of %zu bytes to packet queue", len);
+
// Notify event loop
signal_trigger(&mesh->loop, &mesh->datafromapp);
void meshlink_send_from_queue(event_loop_t *loop, void *data) {
(void)loop;
meshlink_handle_t *mesh = data;
- vpn_packet_t *packet = meshlink_queue_pop(&mesh->outpacketqueue);
- if(!packet) {
- return;
- }
-
- mesh->self->in_packets++;
- mesh->self->in_bytes += packet->len;
- route(mesh, mesh->self, packet);
+ logger(mesh, MESHLINK_DEBUG, "Flushing the packet queue");
- free(packet);
+ for(vpn_packet_t *packet; (packet = meshlink_queue_pop(&mesh->outpacketqueue));) {
+ logger(mesh, MESHLINK_DEBUG, "Removing packet of %d bytes from packet queue", packet->len);
+ mesh->self->in_packets++;
+ mesh->self->in_bytes += packet->len;
+ route(mesh, mesh->self, packet);
+ free(packet);
+ }
}
ssize_t meshlink_get_pmtu(meshlink_handle_t *mesh, meshlink_node_t *destination) {
char *combo;
if(port) {
- if(strchr(address, ':')) {
- xasprintf(&combo, "[%s]:%s", address, port);
- } else {
- xasprintf(&combo, "%s:%s", address, port);
- }
+ xasprintf(&combo, "%s/%s", address, port);
} else {
combo = xstrdup(address);
}
return true;
}
- if(!try_bind(port)) {
+ if(!try_bind(mesh, port)) {
meshlink_errno = MESHLINK_ENETWORK;
return false;
}
n->status.udp_confirmed = false;
if(n->status.reachable) {
- n->last_unreachable = mesh->loop.now.tv_sec;
+ n->last_unreachable = time(NULL);
}
/* Graph updates will suppress status updates for blacklisted nodes, so we need to
n->status.blacklisted = false;
if(n->status.reachable) {
- n->last_reachable = mesh->loop.now.tv_sec;
+ n->last_reachable = time(NULL);
update_node_status(mesh, n);
}
}
meshlink_handle_t *mesh = n->mesh;
- return meshlink_send(mesh, (meshlink_node_t *)n, data, len) ? (ssize_t)len : -1;
+ return meshlink_send_immediate(mesh, (meshlink_node_t *)n, data, len) ? (ssize_t)len : -1;
}
void meshlink_set_channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_receive_cb_t cb) {
for splay_each(node_t, n, mesh->nodes) {
if(!n->utcp && n != mesh->self) {
n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
+ utcp_set_mtu(n->utcp, n->mtu - sizeof(meshlink_packethdr_t));
}
}
if(!n->utcp) {
n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
+ utcp_set_mtu(n->utcp, n->mtu - sizeof(meshlink_packethdr_t));
mesh->receive_cb = channel_receive;
if(!n->utcp) {
return utcp_get_recvq(channel->c);
}
+size_t meshlink_channel_get_mss(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
+ if(!mesh || !channel) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+
+ return utcp_get_mss(channel->node->utcp);
+}
+
void meshlink_set_node_channel_timeout(meshlink_handle_t *mesh, meshlink_node_t *node, int timeout) {
if(!mesh || !node) {
meshlink_errno = MESHLINK_EINVAL;
if(!n->utcp) {
n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
+ utcp_set_mtu(n->utcp, n->mtu - sizeof(meshlink_packethdr_t));
}
utcp_set_user_timeout(n->utcp, timeout);
void update_node_status(meshlink_handle_t *mesh, node_t *n) {
if(n->status.reachable && mesh->channel_accept_cb && !n->utcp) {
n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
+ utcp_set_mtu(n->utcp, n->mtu - sizeof(meshlink_packethdr_t));
}
if(mesh->node_status_cb) {
}
void update_node_pmtu(meshlink_handle_t *mesh, node_t *n) {
+ utcp_set_mtu(n->utcp, (n->minmtu > MINMTU ? n->minmtu : MINMTU) - sizeof(meshlink_packethdr_t));
+
if(mesh->node_pmtu_cb && !n->status.blacklisted) {
mesh->node_pmtu_cb(mesh, (meshlink_node_t *)n, n->minmtu);
}
projects / meshlink / blobdiff