#include "system.h"
#include <pthread.h>
+#include "adns.h"
#include "crypto.h"
#include "ecdsagen.h"
#include "logger.h"
#include "meshlink_internal.h"
+#include "net.h"
#include "netutl.h"
#include "node.h"
#include "submesh.h"
// Find out what local address a socket would use if we connect to the given address.
// We do this using connect() on a UDP socket, so the kernel has to resolve the address
// of both endpoints, but this will actually not send any UDP packet.
-static bool getlocaladdr(char *destaddr, sockaddr_t *sa, socklen_t *salen, int netns) {
+static bool getlocaladdr(const char *destaddr, sockaddr_t *sa, socklen_t *salen, int netns) {
struct addrinfo *rai = NULL;
const struct addrinfo hint = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_DGRAM,
.ai_protocol = IPPROTO_UDP,
+ .ai_flags = AI_NUMERICHOST | AI_NUMERICSERV,
};
if(getaddrinfo(destaddr, "80", &hint, &rai) || !rai) {
return true;
}
-static bool getlocaladdrname(char *destaddr, char *host, socklen_t hostlen, int netns) {
+static bool getlocaladdrname(const char *destaddr, char *host, socklen_t hostlen, int netns) {
sockaddr_t sa;
socklen_t salen = sizeof(sa);
}
logger(mesh, MESHLINK_DEBUG, "Trying to discover externally visible hostname...\n");
- struct addrinfo *ai = str2addrinfo(host, port ? port : "80", SOCK_STREAM);
+ struct addrinfo *ai = adns_blocking_request(mesh, xstrdup(host), xstrdup(port ? port : "80"), SOCK_STREAM, 5);
char line[256];
char *hostname = NULL;
return xstrdup(localaddr);
}
-void remove_duplicate_hostnames(char *host[], char *port[], int n) {
+static void remove_duplicate_hostnames(char *host[], char *port[], int n) {
for(int i = 0; i < n; i++) {
if(!host[i]) {
continue;
}
// Convert what we have to a sockaddr
- struct addrinfo *ai_in, *ai_out;
- struct addrinfo hint = {
- .ai_family = AF_UNSPEC,
- .ai_flags = AI_NUMERICSERV,
- .ai_socktype = SOCK_STREAM,
- };
- int err = getaddrinfo(hostname[i], port[i], &hint, &ai_in);
-
- if(err || !ai_in) {
+ struct addrinfo *ai_in = adns_blocking_request(mesh, xstrdup(hostname[i]), xstrdup(port[i]), SOCK_STREAM, 5);
+
+ if(!ai_in) {
continue;
}
node_add_recent_address(mesh, mesh->self, (sockaddr_t *)aip->ai_addr);
}
- if(flags & MESHLINK_INVITE_NUMERIC) {
- // We don't need to do any further conversion
- freeaddrinfo(ai_in);
- continue;
- }
-
- // Convert it to a hostname
- char resolved_host[NI_MAXHOST];
- char resolved_port[NI_MAXSERV];
- err = getnameinfo(ai_in->ai_addr, ai_in->ai_addrlen, resolved_host, sizeof resolved_host, resolved_port, sizeof resolved_port, NI_NUMERICSERV);
-
- if(err || !is_valid_hostname(resolved_host)) {
- freeaddrinfo(ai_in);
- continue;
- }
-
- // Convert the hostname back to a sockaddr
- hint.ai_family = ai_in->ai_family;
- err = getaddrinfo(resolved_host, resolved_port, &hint, &ai_out);
-
- if(err || !ai_out) {
- freeaddrinfo(ai_in);
- continue;
- }
-
- // Check if it's still the same sockaddr
- if(ai_in->ai_addrlen != ai_out->ai_addrlen || memcmp(ai_in->ai_addr, ai_out->ai_addr, ai_in->ai_addrlen)) {
- freeaddrinfo(ai_in);
- freeaddrinfo(ai_out);
- continue;
- }
-
- // Yes: replace the hostname with the resolved one
- free(hostname[i]);
- hostname[i] = xstrdup(resolved_host);
-
freeaddrinfo(ai_in);
- freeaddrinfo(ai_out);
+ continue;
}
// Remove duplicates again, since IPv4 and IPv6 addresses might map to the same hostname
}
char *name = packmsg_get_str_dup(&in);
- packmsg_skip_element(&in); /* submesh */
+ char *submesh_name = packmsg_get_str_dup(&in);
dev_class_t devclass = packmsg_get_int32(&in);
uint32_t count = packmsg_get_array(&in);
- if(!name) {
- logger(mesh, MESHLINK_DEBUG, "No Name found in invitation!\n");
+ if(!name || !check_id(name)) {
+ logger(mesh, MESHLINK_DEBUG, "No valid Name found in invitation!\n");
+ free(name);
+ free(submesh_name);
return false;
}
- if(!check_id(name)) {
- logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation: %s!\n", name);
+ if(!submesh_name || (strcmp(submesh_name, CORE_MESH) && !check_id(submesh_name))) {
+ logger(mesh, MESHLINK_DEBUG, "No valid Submesh found in invitation!\n");
free(name);
+ free(submesh_name);
return false;
}
if(!count) {
logger(mesh, MESHLINK_ERROR, "Incomplete invitation file!\n");
free(name);
+ free(submesh_name);
return false;
}
free(mesh->self->name);
mesh->name = name;
mesh->self->name = xstrdup(name);
+ mesh->self->submesh = strcmp(submesh_name, CORE_MESH) ? lookup_or_create_submesh(mesh, submesh_name) : NULL;
+ free(submesh_name);
mesh->self->devclass = devclass == DEV_CLASS_UNKNOWN ? mesh->devclass : devclass;
// Initialize configuration directory
// Write host config files
for(uint32_t i = 0; i < count; i++) {
const void *data;
- uint32_t len = packmsg_get_bin_raw(&in, &data);
+ uint32_t data_len = packmsg_get_bin_raw(&in, &data);
- if(!len) {
+ if(!data_len) {
logger(mesh, MESHLINK_ERROR, "Incomplete invitation file!\n");
return false;
}
- packmsg_input_t in2 = {data, len};
- uint32_t version = packmsg_get_uint32(&in2);
- char *name = packmsg_get_str_dup(&in2);
+ packmsg_input_t in2 = {data, data_len};
+ uint32_t version2 = packmsg_get_uint32(&in2);
+ char *name2 = packmsg_get_str_dup(&in2);
- if(!packmsg_input_ok(&in2) || version != MESHLINK_CONFIG_VERSION || !check_id(name)) {
- free(name);
+ if(!packmsg_input_ok(&in2) || version2 != MESHLINK_CONFIG_VERSION || !check_id(name2)) {
+ free(name2);
packmsg_input_invalidate(&in);
break;
}
- if(!check_id(name)) {
- free(name);
+ if(!check_id(name2)) {
+ free(name2);
break;
}
- if(!strcmp(name, mesh->name)) {
+ if(!strcmp(name2, mesh->name)) {
logger(mesh, MESHLINK_DEBUG, "Secondary chunk would overwrite our own host config file.\n");
- free(name);
+ free(name2);
meshlink_errno = MESHLINK_EPEER;
return false;
}
node_t *n = new_node();
- n->name = name;
+ n->name = name2;
- config_t config = {data, len};
+ config_t config = {data, data_len};
if(!node_read_from_config(mesh, n, &config)) {
free_node(n);
return true;
}
-static bool sendline(int fd, char *format, ...) {
+static bool sendline(int fd, const char *format, ...) {
char buffer[4096];
char *p = buffer;
int blen = 0;
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;
}
}
return false;
}
-#if 0
-
- // TODO: check this?
if(mesh->name && strcmp(mesh->name, name)) {
logger(NULL, MESHLINK_ERROR, "Configuration is for a different name (%s)!", name);
meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
-#endif
-
free(mesh->name);
mesh->name = name;
xasprintf(&mesh->myport, "%u", myport);
return NULL;
}
- if(!name || !*name) {
- logger(NULL, MESHLINK_ERROR, "No name given!\n");
- meshlink_errno = MESHLINK_EINVAL;
- return NULL;
- };
-
- if(!check_id(name)) {
+ if(name && !check_id(name)) {
logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
meshlink_errno = MESHLINK_EINVAL;
return NULL;
meshlink_open_params_t *params = xzalloc(sizeof * params);
params->confbase = xstrdup(confbase);
- params->name = xstrdup(name);
+ params->name = name ? xstrdup(name) : NULL;
params->appname = xstrdup(appname);
params->devclass = devclass;
params->netns = -1;
}
meshlink_handle_t *meshlink_open_ephemeral(const char *name, const char *appname, dev_class_t devclass) {
+ if(!name) {
+ logger(NULL, MESHLINK_ERROR, "No name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(!check_id(name)) {
+ logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(!appname || !*appname) {
+ logger(NULL, MESHLINK_ERROR, "No appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(strchr(appname, ' ')) {
+ logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(devclass < 0 || devclass >= DEV_CLASS_COUNT) {
+ logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
/* Create a temporary struct on the stack, to avoid allocating and freeing one. */
meshlink_open_params_t params;
memset(¶ms, 0, sizeof(params));
}
meshlink_handle_t *meshlink_open_ex(const meshlink_open_params_t *params) {
- // Validate arguments provided by the application
- bool usingname = false;
-
logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
+ // Validate arguments provided by the application
if(!params->appname || !*params->appname) {
logger(NULL, MESHLINK_ERROR, "No appname given!\n");
meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
- if(!params->name || !*params->name) {
- logger(NULL, MESHLINK_ERROR, "No name given!\n");
- //return NULL;
- } else { //check name only if there is a name != NULL
-
- if(!check_id(params->name)) {
- logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
- meshlink_errno = MESHLINK_EINVAL;
- return NULL;
- } else {
- usingname = true;
- }
+ if(params->name && !check_id(params->name)) {
+ logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
}
if(params->devclass < 0 || params->devclass >= DEV_CLASS_COUNT) {
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));
memcpy(mesh->dev_class_traits, default_class_traits, sizeof(default_class_traits));
- if(usingname) {
- mesh->name = xstrdup(params->name);
- }
+ mesh->name = params->name ? xstrdup(params->name) : NULL;
// Hash the key
if(params->key) {
// If no configuration exists yet, create it.
if(!meshlink_confbase_exists(mesh)) {
+ if(!mesh->name) {
+ logger(NULL, MESHLINK_ERROR, "No configuration files found!\n");
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return NULL;
+ }
+
if(!meshlink_setup(mesh)) {
logger(NULL, MESHLINK_ERROR, "Cannot create initial configuration\n");
meshlink_close(mesh);
}
init_outgoings(mesh);
+ init_adns(mesh);
// Start the main thread
event_loop_start(&mesh->loop);
- if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
+ // Ensure we have a decent amount of stack space. Musl's default of 80 kB is too small.
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setstacksize(&attr, 1024 * 1024);
+
+ if(pthread_create(&mesh->thread, &attr, meshlink_main_loop, mesh) != 0) {
logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
memset(&mesh->thread, 0, sizeof(mesh)->thread);
meshlink_errno = MESHLINK_EINTERNAL;
}
}
+ exit_adns(mesh);
exit_outgoings(mesh);
// Ensure we are considered unreachable
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);
memset(hdr, 0, sizeof(*hdr));
// leave the last byte as 0 to make sure strings are always
// null-terminated if they are longer than the buffer
- strncpy((char *)hdr->destination, destination->name, (sizeof(hdr)->destination) - 1);
- strncpy((char *)hdr->source, mesh->self->name, (sizeof(hdr)->source) - 1);
+ strncpy((char *)hdr->destination, destination->name, sizeof(hdr->destination) - 1);
+ strncpy((char *)hdr->source, mesh->self->name, sizeof(hdr->source) - 1);
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);
+ return false;
+ }
+
// Queue it
if(!meshlink_queue_push(&mesh->outpacketqueue, packet)) {
free(packet);
}
if(!is_valid_hostname(address)) {
- logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s", address);
meshlink_errno = MESHLINK_EINVAL;
return false;
}
+ if((node_t *)node != mesh->self && !port) {
+ logger(mesh, MESHLINK_DEBUG, "Missing port number!");
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+
+ }
+
if(port && !is_valid_port(port)) {
- logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s\n", address);
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s", address);
meshlink_errno = MESHLINK_EINVAL;
return false;
}
}
// Connect to the meshlink daemon mentioned in the URL.
- struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
+ struct addrinfo *ai = adns_blocking_request(mesh, xstrdup(address), xstrdup(port), SOCK_STREAM, 5);
if(ai) {
for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
- state.sock = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
+ state.sock = socket_in_netns(aip->ai_family, SOCK_STREAM, IPPROTO_TCP, mesh->netns);
if(state.sock == -1) {
logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
packmsg_add_int32(&out, mesh->self->devclass);
packmsg_add_bool(&out, mesh->self->status.blacklisted);
packmsg_add_bin(&out, ecdsa_get_public_key(mesh->private_key), 32);
- packmsg_add_str(&out, mesh->self->canonical_address ? mesh->self->canonical_address : "");
+
+ if(mesh->self->canonical_address && !strchr(mesh->self->canonical_address, ' ')) {
+ char *canonical_address = NULL;
+ xasprintf(&canonical_address, "%s %s", mesh->self->canonical_address, mesh->myport);
+ packmsg_add_str(&out, canonical_address);
+ free(canonical_address);
+ } else {
+ packmsg_add_str(&out, mesh->self->canonical_address ? mesh->self->canonical_address : "");
+ }
uint32_t count = 0;
pthread_mutex_lock(&mesh->mutex);
while(count--) {
- const void *data;
- uint32_t len = packmsg_get_bin_raw(&in, &data);
+ const void *data2;
+ uint32_t len2 = packmsg_get_bin_raw(&in, &data2);
- if(!len) {
+ if(!len2) {
break;
}
- packmsg_input_t in2 = {data, len};
+ packmsg_input_t in2 = {data2, len2};
uint32_t version = packmsg_get_uint32(&in2);
char *name = packmsg_get_str_dup(&in2);
n = new_node();
n->name = name;
- config_t config = {data, len};
+ config_t config = {data2, len2};
if(!node_read_from_config(mesh, n, &config)) {
free_node(n);
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);
}
if(mesh->outgoings) {
for list_each(outgoing_t, outgoing, mesh->outgoings) {
if(outgoing->node == n) {
- list_delete_node(mesh->outgoings, node);
+ list_delete_node(mesh->outgoings, list_node);
}
}
}
return mesh->channel_accept_cb;
}
-static void aio_signal(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_aio_buffer_t *aio) {
- if(aio->data) {
- if(aio->cb.buffer) {
- aio->cb.buffer(mesh, channel, aio->data, aio->len, aio->priv);
+/* Finish one AIO buffer, return true if the channel is still open. */
+static bool aio_finish_one(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_aio_buffer_t **head) {
+ meshlink_aio_buffer_t *aio = *head;
+ *head = aio->next;
+
+ if(channel->c) {
+ channel->in_callback = true;
+
+ if(aio->data) {
+ if(aio->cb.buffer) {
+ aio->cb.buffer(mesh, channel, aio->data, aio->done, aio->priv);
+ }
+ } else {
+ if(aio->cb.fd) {
+ aio->cb.fd(mesh, channel, aio->fd, aio->done, aio->priv);
+ }
+ }
+
+ channel->in_callback = false;
+
+ if(!channel->c) {
+ free(aio);
+ free(channel);
+ return false;
}
- } else {
- if(aio->cb.fd) {
- aio->cb.fd(mesh, channel, aio->fd, aio->done, aio->priv);
+ }
+
+ free(aio);
+ return true;
+}
+
+/* Finish all AIO buffers, return true if the channel is still open. */
+static bool aio_abort(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_aio_buffer_t **head) {
+ while(*head) {
+ if(!aio_finish_one(mesh, channel, head)) {
+ return false;
}
}
+
+ return true;
}
static ssize_t channel_recv(struct utcp_connection *connection, const void *data, size_t len) {
size_t left = len;
while(channel->aio_receive) {
+ if(!len) {
+ /* This receive callback signalled an error, abort all outstanding AIO buffers. */
+ if(!aio_abort(mesh, channel, &channel->aio_receive)) {
+ return len;
+ }
+
+ break;
+ }
+
meshlink_aio_buffer_t *aio = channel->aio_receive;
size_t todo = aio->len - aio->done;
} else {
ssize_t result = write(aio->fd, p, todo);
- if(result > 0) {
- todo = result;
+ if(result <= 0) {
+ if(result < 0 && errno == EINTR) {
+ continue;
+ }
+
+ /* Writing to fd failed, cancel just this AIO buffer. */
+ logger(mesh, MESHLINK_ERROR, "Writing to AIO fd %d failed: %s", aio->fd, strerror(errno));
+
+ if(!aio_finish_one(mesh, channel, &channel->aio_receive)) {
+ return len;
+ }
+
+ continue;
}
+
+ todo = result;
}
aio->done += todo;
+ p += todo;
+ left -= todo;
if(aio->done == aio->len) {
- channel->aio_receive = aio->next;
- aio_signal(mesh, channel, aio);
- free(aio);
+ if(!aio_finish_one(mesh, channel, &channel->aio_receive)) {
+ return len;
+ }
}
- p += todo;
- left -= todo;
-
- if(!left && len) {
+ if(!left) {
return len;
}
}
}
}
+static void channel_retransmit(struct utcp_connection *utcp_connection) {
+ node_t *n = utcp_connection->utcp->priv;
+ meshlink_handle_t *mesh = n->mesh;
+
+ if(n->mtuprobes == 31) {
+ timeout_set(&mesh->loop, &n->mtutimeout, &(struct timespec) {
+ 0, 0
+ });
+ }
+}
+
static ssize_t channel_send(struct utcp *utcp, const void *data, size_t len) {
node_t *n = utcp->priv;
}
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) {
node_t *n = channel->node;
meshlink_handle_t *mesh = n->mesh;
- meshlink_aio_buffer_t *aio = channel->aio_send;
- if(aio) {
- /* We at least one AIO buffer. Send as much as possible form the first buffer. */
- size_t left = aio->len - aio->done;
+ while(channel->aio_send) {
+ if(!len) {
+ /* This poll callback signalled an error, abort all outstanding AIO buffers. */
+ if(!aio_abort(mesh, channel, &channel->aio_send)) {
+ return;
+ }
+
+ break;
+ }
+
+ /* We have at least one AIO buffer. Send as much as possible from the buffers. */
+ meshlink_aio_buffer_t *aio = channel->aio_send;
+ size_t todo = aio->len - aio->done;
ssize_t sent;
- if(len > left) {
- len = left;
+ if(todo > len) {
+ todo = len;
}
if(aio->data) {
- sent = utcp_send(connection, (char *)aio->data + aio->done, len);
+ sent = utcp_send(connection, (char *)aio->data + aio->done, todo);
} else {
- char buf[65536];
- size_t todo = utcp_get_sndbuf_free(connection);
-
- if(todo > left) {
- todo = left;
- }
-
- if(todo > sizeof(buf)) {
- todo = sizeof(buf);
+ /* Limit the amount we read at once to avoid stack overflows */
+ if(todo > 65536) {
+ todo = 65536;
}
+ char buf[todo];
ssize_t result = read(aio->fd, buf, todo);
if(result > 0) {
- sent = utcp_send(connection, buf, result);
+ todo = result;
+ sent = utcp_send(connection, buf, todo);
} else {
- sent = result;
+ if(result < 0 && errno == EINTR) {
+ continue;
+ }
+
+ /* Reading from fd failed, cancel just this AIO buffer. */
+ if(result != 0) {
+ logger(mesh, MESHLINK_ERROR, "Reading from AIO fd %d failed: %s", aio->fd, strerror(errno));
+ }
+
+ if(!aio_finish_one(mesh, channel, &channel->aio_send)) {
+ return;
+ }
+
+ continue;
}
}
- if(sent >= 0) {
- aio->done += sent;
+ if(sent != (ssize_t)todo) {
+ /* We should never get a partial send at this point */
+ assert(sent <= 0);
+
+ /* Sending failed, abort all outstanding AIO buffers and send a poll callback. */
+ if(!aio_abort(mesh, channel, &channel->aio_send)) {
+ return;
+ }
+
+ len = 0;
+ break;
}
- /* If the buffer is now completely sent, call the callback and dispose of it. */
- if(aio->done >= aio->len) {
- channel->aio_send = aio->next;
- aio_signal(mesh, channel, aio);
- free(aio);
+ aio->done += sent;
+ len -= sent;
+
+ /* If we didn't finish this buffer, exit early. */
+ if(aio->done < aio->len) {
+ return;
}
- } else {
- if(channel->poll_cb) {
- channel->poll_cb(mesh, channel, len);
- } else {
- utcp_set_poll_cb(connection, NULL);
+
+ /* Signal completion of this buffer, and go to the next one. */
+ if(!aio_finish_one(mesh, channel, &channel->aio_send)) {
+ return;
+ }
+
+ if(!len) {
+ return;
}
}
+
+ if(channel->poll_cb) {
+ channel->poll_cb(mesh, channel, len);
+ } else {
+ utcp_set_poll_cb(connection, NULL);
+ }
}
void meshlink_set_channel_poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_poll_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));
+ utcp_set_retransmit_cb(n->utcp, channel_retransmit);
}
}
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_retransmit_cb(n->utcp, channel_retransmit);
mesh->receive_cb = channel_receive;
if(!n->utcp) {
pthread_mutex_lock(&mesh->mutex);
- utcp_close(channel->c);
+ if(channel->c) {
+ utcp_close(channel->c);
+ channel->c = NULL;
- /* Clean up any outstanding AIO buffers. */
- for(meshlink_aio_buffer_t *aio = channel->aio_send, *next; aio; aio = next) {
- next = aio->next;
- aio_signal(mesh, channel, aio);
- free(aio);
+ /* Clean up any outstanding AIO buffers. */
+ aio_abort(mesh, channel, &channel->aio_send);
+ aio_abort(mesh, channel, &channel->aio_receive);
}
- for(meshlink_aio_buffer_t *aio = channel->aio_receive, *next; aio; aio = next) {
- next = aio->next;
- aio_signal(mesh, channel, aio);
- free(aio);
+ if(!channel->in_callback) {
+ free(channel);
}
pthread_mutex_unlock(&mesh->mutex);
-
- free(channel);
}
ssize_t meshlink_channel_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
/* Ensure the poll callback is set, and call it right now to push data if possible */
utcp_set_poll_cb(channel->c, channel_poll);
- channel_poll(channel->c, len);
+ size_t todo = MIN(len, utcp_get_rcvbuf_free(channel->c));
+
+ if(todo) {
+ channel_poll(channel->c, todo);
+ }
pthread_mutex_unlock(&mesh->mutex);
/* Ensure the poll callback is set, and call it right now to push data if possible */
utcp_set_poll_cb(channel->c, channel_poll);
- channel_poll(channel->c, len);
+ size_t left = utcp_get_rcvbuf_free(channel->c);
+
+ if(left) {
+ channel_poll(channel->c, left);
+ }
pthread_mutex_unlock(&mesh->mutex);
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_retransmit_cb(n->utcp, channel_retransmit);
}
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));
+ utcp_set_retransmit_cb(n->utcp, channel_retransmit);
}
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);
}
pthread_mutex_unlock(&mesh->mutex);
}
+void meshlink_set_scheduling_granularity(struct meshlink_handle *mesh, long granularity) {
+ if(!mesh || granularity < 0) {
+ meshlink_errno = EINVAL;
+ return;
+ }
+
+ utcp_set_clock_granularity(granularity);
+}
+
void handle_network_change(meshlink_handle_t *mesh, bool online) {
(void)online;
retry(mesh);
}
-void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t meshlink_errno) {
+void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t cb_errno) {
// We should only call the callback function if we are in the background thread.
if(!mesh->error_cb) {
return;
}
if(mesh->thread == pthread_self()) {
- mesh->error_cb(mesh, meshlink_errno);
+ mesh->error_cb(mesh, cb_errno);
}
}
static void __attribute__((constructor)) meshlink_init(void) {
crypto_init();
+ utcp_set_clock_granularity(10000);
}
static void __attribute__((destructor)) meshlink_exit(void) {