#include "meshlink_internal.h"
#include "netutl.h"
#include "node.h"
+#include "submesh.h"
#include "protocol.h"
#include "route.h"
#include "sockaddr.h"
meshlink_log_cb_t global_log_cb;
meshlink_log_level_t global_log_level;
+typedef bool (*search_node_by_condition_t)(const node_t *, const void *);
+
//TODO: this can go away completely
const var_t variables[] = {
/* Server configuration */
{"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
{"Name", VAR_SERVER},
/* Host configuration */
+ {"SubMesh", VAR_HOST | VAR_SAFE},
{"CanonicalAddress", VAR_HOST},
{"Address", VAR_HOST | VAR_MULTIPLE},
{"ECDSAPublicKey", VAR_HOST},
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
}
+struct socket_in_netns_params {
+ int domain;
+ int type;
+ int protocol;
+ int netns;
+ int fd;
+};
+
+static void *socket_in_netns_thread(void *arg) {
+ struct socket_in_netns_params *params = arg;
+
+ if(setns(params->netns, CLONE_NEWNET) == -1) {
+ meshlink_errno = MESHLINK_EINVAL;
+ } else {
+ params->fd = socket(params->domain, params->type, params->protocol);
+ }
+
+ return NULL;
+}
+
+static int socket_in_netns(int domain, int type, int protocol, int netns) {
+ if(netns == -1) {
+ return socket(domain, type, protocol);
+ }
+
+ struct socket_in_netns_params params = {domain, type, protocol, netns, -1};
+
+ pthread_t thr;
+
+ if(pthread_create(&thr, NULL, socket_in_netns_thread, ¶ms) == 0) {
+ pthread_join(thr, NULL);
+ }
+
+ return params.fd;
+}
+
// 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 getlocaladdrname(char *destaddr, char *host, socklen_t hostlen) {
+static bool getlocaladdrname(char *destaddr, char *host, socklen_t hostlen, int netns) {
struct addrinfo *rai = NULL;
const struct addrinfo hint = {
.ai_family = AF_UNSPEC,
return false;
}
- int sock = socket(rai->ai_family, rai->ai_socktype, rai->ai_protocol);
+ int sock = socket_in_netns(rai->ai_family, rai->ai_socktype, rai->ai_protocol, netns);
if(sock == -1) {
freeaddrinfo(rai);
}
if(connect(sock, rai->ai_addr, rai->ai_addrlen) && !sockwouldblock(errno)) {
+ closesocket(sock);
freeaddrinfo(rai);
return false;
}
socklen_t sl = sizeof(sn);
if(getsockname(sock, (struct sockaddr *)&sn, &sl)) {
+ closesocket(sock);
return false;
}
+ closesocket(sock);
+
if(getnameinfo((struct sockaddr *)&sn, sl, host, hostlen, NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV)) {
return false;
}
continue;
}
- int s = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
+ int s = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
if(s >= 0) {
set_timeout(s, 5000);
bool success = false;
if(family == AF_INET) {
- success = getlocaladdrname("93.184.216.34", localaddr, sizeof(localaddr));
+ success = getlocaladdrname("93.184.216.34", localaddr, sizeof(localaddr), mesh->netns);
} else if(family == AF_INET6) {
- success = getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", localaddr, sizeof(localaddr));
+ success = getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", localaddr, sizeof(localaddr), mesh->netns);
}
if(!success) {
flags |= MESHLINK_INVITE_IPV4 | MESHLINK_INVITE_IPV6;
}
- fprintf(stderr, "flags = %u\n", flags);
-
// Add local addresses if requested
if(flags & MESHLINK_INVITE_LOCAL) {
if(flags & MESHLINK_INVITE_IPV4) {
return false;
}
- while(ai) {
- int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ //while(ai) {
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ int fd = socket(aip->ai_family, SOCK_STREAM, IPPROTO_TCP);
if(!fd) {
freeaddrinfo(ai);
return false;
}
- int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+ int result = bind(fd, aip->ai_addr, aip->ai_addrlen);
closesocket(fd);
if(result) {
freeaddrinfo(ai);
return false;
}
-
- ai = ai->ai_next;
}
freeaddrinfo(ai);
return finalize_join(mesh);
case 2:
- logger(mesh, MESHLINK_DEBUG, "Invitation succesfully accepted.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invitation successfully accepted.\n");
shutdown(mesh->sock, SHUT_RDWR);
mesh->success = true;
break;
// IPv4 example.org
- if(getlocaladdrname("93.184.216.34", host, sizeof(host))) {
+ if(getlocaladdrname("93.184.216.34", host, sizeof(host), mesh->netns)) {
snprintf(entry, sizeof(entry), "%s %s", host, mesh->myport);
append_config_file(mesh, mesh->name, "Address", entry);
}
// IPv6 example.org
- if(getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", host, sizeof(host))) {
+ if(getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", host, sizeof(host), mesh->netns)) {
snprintf(entry, sizeof(entry), "%s %s", host, mesh->myport);
append_config_file(mesh, mesh->name, "Address", entry);
}
return true;
}
-meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
- // Validate arguments provided by the application
- bool usingname = false;
+static void *setup_network_in_netns_thread(void *arg) {
+ meshlink_handle_t *mesh = arg;
- logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
+ if(setns(mesh->netns, CLONE_NEWNET) != 0) {
+ return NULL;
+ }
+ bool success = setup_network(mesh);
+ add_local_addresses(mesh);
+ return success ? arg : NULL;
+}
+
+meshlink_open_params_t *meshlink_open_params_init(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
if(!confbase || !*confbase) {
logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
meshlink_errno = MESHLINK_EINVAL;
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;
+ }
+ }
+
+ if((int)devclass < 0 || devclass > _DEV_CLASS_MAX) {
+ logger(NULL, MESHLINK_ERROR, "Invalid devclass 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->appname = xstrdup(appname);
+ params->devclass = devclass;
+ params->netns = -1;
+
+ return params;
+}
+
+void meshlink_open_params_free(meshlink_open_params_t *params) {
+ if(!params) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ free(params->confbase);
+ free(params->name);
+ free(params->appname);
+
+ free(params);
+}
+
+meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
+ /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
+ meshlink_open_params_t params = {NULL};
+
+ params.confbase = (char *)confbase;
+ params.name = (char *)name;
+ params.appname = (char *)appname;
+ params.devclass = devclass;
+ params.netns = -1;
+
+ return meshlink_open_ex(¶ms);
+}
+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");
+
+ if(!params->confbase || !*params->confbase) {
+ logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(!params->appname || !*params->appname) {
+ logger(NULL, MESHLINK_ERROR, "No appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(strchr(params->appname, ' ')) {
+ logger(NULL, MESHLINK_ERROR, "Invalid 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((int)devclass < 0 || devclass > _DEV_CLASS_MAX) {
+ if((int)params->devclass < 0 || params->devclass > _DEV_CLASS_MAX) {
logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
meshlink_handle_t *mesh = xzalloc(sizeof(meshlink_handle_t));
- mesh->confbase = xstrdup(confbase);
- mesh->appname = xstrdup(appname);
- mesh->devclass = devclass;
+ mesh->confbase = xstrdup(params->confbase);
+ mesh->appname = xstrdup(params->appname);
+ mesh->devclass = params->devclass;
mesh->discovery = true;
mesh->invitation_timeout = 604800; // 1 week
+ mesh->netns = params->netns;
+ mesh->submeshes = NULL;
if(usingname) {
- mesh->name = xstrdup(name);
+ mesh->name = xstrdup(params->name);
}
// initialize mutex
// Check whether meshlink.conf already exists
char filename[PATH_MAX];
- snprintf(filename, sizeof(filename), "%s" SLASH "meshlink.conf", confbase);
+ snprintf(filename, sizeof(filename), "%s" SLASH "meshlink.conf", params->confbase);
if(access(filename, R_OK)) {
if(errno == ENOENT) {
// Setup up everything
// TODO: we should not open listening sockets yet
- if(!setup_network(mesh)) {
+ bool success = false;
+
+ if(mesh->netns != -1) {
+ pthread_t thr;
+
+ if(pthread_create(&thr, NULL, setup_network_in_netns_thread, mesh) == 0) {
+ void *retval = NULL;
+ success = pthread_join(thr, &retval) == 0 && retval;
+ }
+ } else {
+ success = setup_network(mesh);
+ add_local_addresses(mesh);
+ }
+
+ if(!success) {
meshlink_close(mesh);
meshlink_errno = MESHLINK_ENETWORK;
return NULL;
}
- add_local_addresses(mesh);
-
idle_set(&mesh->loop, idle, mesh);
logger(NULL, MESHLINK_DEBUG, "meshlink_open returning\n");
return mesh;
}
+meshlink_submesh_t *meshlink_submesh_open(meshlink_handle_t *mesh, const char *submesh) {
+ meshlink_submesh_t *s = NULL;
+
+ if(!mesh) {
+ logger(NULL, MESHLINK_ERROR, "No mesh handle given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(!submesh || !*submesh) {
+ logger(NULL, MESHLINK_ERROR, "No submesh name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ //lock mesh->nodes
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ s = (meshlink_submesh_t *)create_submesh(mesh, submesh);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return s;
+}
+
static void *meshlink_main_loop(void *arg) {
meshlink_handle_t *mesh = arg;
+ if(mesh->netns != -1) {
+ if(setns(mesh->netns, CLONE_NEWNET) != 0) {
+ return NULL;
+ }
+ }
+
pthread_mutex_lock(&(mesh->mesh_mutex));
try_outgoing_connections(mesh);
ecdsa_free(mesh->invitation_key);
+ if(mesh->netns != -1) {
+ close(mesh->netns);
+ }
+
free(mesh->name);
free(mesh->appname);
free(mesh->confbase);
if(mesh->conffile) {
fclose(mesh->conffile);
- }
+ }
memset(mesh, 0, sizeof(*mesh));
return false;
}
+ node_t *n = (node_t *)destination;
+
+ if(n->status.blacklisted) {
+ logger(mesh, MESHLINK_ERROR, "Node %s blacklisted, dropping packet\n", n->name);
+ return false;
+ }
+
// Prepare the packet
vpn_packet_t *packet = malloc(sizeof(*packet));
return result;
}
+static meshlink_node_t **meshlink_get_all_nodes_by_condition(meshlink_handle_t *mesh, const void *condition, meshlink_node_t **nodes, size_t *nmemb, search_node_by_condition_t search_node) {
+ meshlink_node_t **result;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ *nmemb = 0;
+
+ for splay_each(node_t, n, mesh->nodes) {
+ if(true == search_node(n, condition)) {
+ *nmemb = *nmemb + 1;
+ }
+ }
+
+ if(*nmemb == 0) {
+ free(nodes);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return NULL;
+ }
+
+ result = realloc(nodes, *nmemb * sizeof(*nodes));
+
+ if(result) {
+ meshlink_node_t **p = result;
+
+ for splay_each(node_t, n, mesh->nodes) {
+ if(true == search_node(n, condition)) {
+ *p++ = (meshlink_node_t *)n;
+ }
+ }
+ } else {
+ *nmemb = 0;
+ free(nodes);
+ meshlink_errno = MESHLINK_ENOMEM;
+ }
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return result;
+}
+
+static bool search_node_by_dev_class(const node_t *node, const void *condition) {
+ dev_class_t *devclass = (dev_class_t *)condition;
+
+ if(*devclass == node->devclass) {
+ return true;
+ }
+
+ return false;
+}
+
+static bool search_node_by_submesh(const node_t *node, const void *condition) {
+ if(condition == node->submesh) {
+ return true;
+ }
+
+ return false;
+}
+
+meshlink_node_t **meshlink_get_all_nodes_by_dev_class(meshlink_handle_t *mesh, dev_class_t devclass, meshlink_node_t **nodes, size_t *nmemb) {
+ if(!mesh || ((int)devclass < 0) || (devclass > _DEV_CLASS_MAX) || !nmemb) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ return meshlink_get_all_nodes_by_condition(mesh, &devclass, nodes, nmemb, search_node_by_dev_class);
+}
+
+meshlink_node_t **meshlink_get_all_nodes_by_submesh(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, meshlink_node_t **nodes, size_t *nmemb) {
+ if(!mesh || !submesh || !nmemb) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ return meshlink_get_all_nodes_by_condition(mesh, submesh, nodes, nmemb, search_node_by_submesh);
+}
+
+dev_class_t meshlink_get_node_dev_class(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+
+ dev_class_t devclass;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ devclass = ((node_t *)node)->devclass;
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return devclass;
+}
+
+meshlink_submesh_t *meshlink_get_node_submesh(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ node_t *n = (node_t *)node;
+
+ meshlink_submesh_t *s;
+
+ s = (meshlink_submesh_t *)n->submesh;
+
+ return s;
+}
+
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;
mesh->invitation_timeout = timeout;
}
-char *meshlink_invite_ex(meshlink_handle_t *mesh, const char *name, uint32_t flags) {
+char *meshlink_invite_ex(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name, uint32_t flags) {
+ meshlink_submesh_t *s = NULL;
+
if(!mesh) {
meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
+ if(submesh) {
+ s = (meshlink_submesh_t *)lookup_submesh(mesh, submesh->name);
+
+ if(s != submesh) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid SubMesh Handle.\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+ } else {
+ s = (meshlink_submesh_t *)mesh->self->submesh;
+ }
+
pthread_mutex_lock(&(mesh->mesh_mutex));
// Check validity of the new node's name
// Fill in the details.
fprintf(f, "Name = %s\n", name);
+
+ if(s) {
+ fprintf(f, "SubMesh = %s\n", s->name);
+ }
+
fprintf(f, "ConnectTo = %s\n", mesh->self->name);
// Copy Broadcast and Mode
return url;
}
-char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
- return meshlink_invite_ex(mesh, name, 0);
+char *meshlink_invite(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name) {
+ return meshlink_invite_ex(mesh, submesh, name, 0);
}
bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
if(ai) {
for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
- mesh->sock = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
+ mesh->sock = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
if(mesh->sock == -1) {
logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
node_t *n;
n = (node_t *)node;
+
+ if(n == mesh->self) {
+ logger(mesh, MESHLINK_ERROR, "%s blacklisting itself?\n", node->name);
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+ }
+
+ if(n->status.blacklisted) {
+ logger(mesh, MESHLINK_DEBUG, "Node %s already blacklisted\n", node->name);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+ }
+
n->status.blacklisted = true;
logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n", node->name);
}
}
+ utcp_abort_all_connections(n->utcp);
+
+ n->mtu = 0;
+ n->minmtu = 0;
+ n->maxmtu = MTU;
+ n->mtuprobes = 0;
+ n->status.udp_confirmed = false;
+
+ if(n->status.reachable) {
+ update_node_status(mesh, n);
+ }
+
pthread_mutex_unlock(&(mesh->mesh_mutex));
}
pthread_mutex_lock(&(mesh->mesh_mutex));
node_t *n = (node_t *)node;
+
+ if(!n->status.blacklisted) {
+ logger(mesh, MESHLINK_DEBUG, "Node %s was already whitelisted\n", node->name);
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+ }
+
n->status.blacklisted = false;
- //TODO: remove blacklisted = yes from the config file
+ if(n->status.reachable) {
+ update_node_status(mesh, n);
+ }
+
+ //Remove blacklisting from the config file
+ append_config_file(mesh, n->name, "blacklisted", NULL);
pthread_mutex_unlock(&(mesh->mesh_mutex));
return;
}
}
+ if(n->status.blacklisted) {
+ logger(mesh, MESHLINK_ERROR, "Cannot open a channel with blacklisted node\n");
+ return NULL;
+ }
+
meshlink_channel_t *channel = xzalloc(sizeof(*channel));
channel->node = n;
channel->receive_cb = cb;
// TODO: more finegrained locking.
// Ideally we want to put the data into the UTCP connection's send buffer.
- // Then, preferrably only if there is room in the receiver window,
+ // Then, preferably only if there is room in the receiver window,
// kick the meshlink thread to go send packets.
pthread_mutex_lock(&mesh->mesh_mutex);
return channel->c->flags;
}
+size_t meshlink_channel_get_sendq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
+ if(!mesh || !channel) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+
+ return utcp_get_sendq(channel->c);
+}
+
+size_t meshlink_channel_get_recvq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
+ if(!mesh || !channel) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+
+ return utcp_get_recvq(channel->c);
+}
+
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);
}
if(mesh->node_status_cb) {
- mesh->node_status_cb(mesh, (meshlink_node_t *)n, n->status.reachable);
+ mesh->node_status_cb(mesh, (meshlink_node_t *)n, n->status.reachable && !n->status.blacklisted);
}
}
projects / meshlink / blobdiff