#include "utils.h"
#include "xalloc.h"
-static const int req_key_timeout = 2;
-
bool key_changed_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
(void)mesh;
(void)c;
return true;
}
-static bool send_initial_sptps_data(void *handle, uint8_t type, const void *data, size_t len) {
- (void)type;
-
- assert(data);
- assert(len);
-
- node_t *to = handle;
- meshlink_handle_t *mesh = to->mesh;
-
- if(!to->nexthop || !to->nexthop->connection) {
- logger(mesh, MESHLINK_WARNING, "Cannot send SPTPS data to %s via %s", to->name, to->nexthop ? to->nexthop->name : to->name);
- return false;
- }
-
- to->sptps.send_data = send_sptps_data;
- char buf[len * 4 / 3 + 5];
- b64encode(data, buf, len);
- return send_request(mesh, to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, mesh->self->name, to->name, REQ_KEY, buf);
-}
-
-bool send_canonical_address(meshlink_handle_t *mesh, node_t *to) {
- if(!mesh->self->canonical_address) {
- return true;
- }
-
- return send_request(mesh, to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, mesh->self->name, to->name, REQ_CANONICAL, mesh->self->canonical_address);
-}
-
-bool send_req_key(meshlink_handle_t *mesh, node_t *to) {
- if(!node_read_public_key(mesh, to)) {
- logger(mesh, MESHLINK_DEBUG, "No ECDSA key known for %s", to->name);
-
- if(!to->nexthop || !to->nexthop->connection) {
- logger(mesh, MESHLINK_WARNING, "Cannot send REQ_PUBKEY to %s via %s", to->name, to->nexthop ? to->nexthop->name : to->name);
- return true;
- }
-
- char *pubkey = ecdsa_get_base64_public_key(mesh->private_key);
- send_request(mesh, to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, mesh->self->name, to->name, REQ_PUBKEY, pubkey);
- free(pubkey);
- return true;
- }
-
- if(to->sptps.label) {
- logger(mesh, MESHLINK_DEBUG, "send_req_key(%s) called while sptps->label != NULL!", to->name);
- }
-
- /* Send our canonical address to help with UDP hole punching */
- send_canonical_address(mesh, to);
-
- char label[sizeof(meshlink_udp_label) + strlen(mesh->self->name) + strlen(to->name) + 2];
- snprintf(label, sizeof(label), "%s %s %s", meshlink_udp_label, mesh->self->name, to->name);
- sptps_stop(&to->sptps);
- to->status.validkey = false;
- to->status.waitingforkey = true;
- to->last_req_key = mesh->loop.now.tv_sec;
- return sptps_start(&to->sptps, to, true, true, mesh->private_key, to->ecdsa, label, sizeof(label) - 1, send_initial_sptps_data, receive_sptps_record);
-}
-
-/* REQ_KEY is overloaded to allow arbitrary requests to be routed between two nodes. */
-
-static bool req_key_ext_h(meshlink_handle_t *mesh, connection_t *c, const char *request, node_t *from, int reqno) {
- (void)c;
-
- if(!from->nexthop || !from->nexthop->connection) {
- logger(mesh, MESHLINK_WARNING, "Cannot answer REQ_KEY from %s via %s", from->name, from->nexthop ? from->nexthop->name : from->name);
- return true;
- }
-
- switch(reqno) {
- case REQ_PUBKEY: {
- char *pubkey = ecdsa_get_base64_public_key(mesh->private_key);
-
- if(!node_read_public_key(mesh, from)) {
- char hiskey[MAX_STRING_SIZE];
-
- if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, hiskey) == 1) {
- from->ecdsa = ecdsa_set_base64_public_key(hiskey);
-
- if(!from->ecdsa) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "REQ_PUBKEY", from->name, "invalid pubkey");
- return true;
- }
-
- logger(mesh, MESHLINK_INFO, "Learned ECDSA public key from %s", from->name);
- from->status.dirty = true;
-
- if(!node_write_config(mesh, from, true)) {
- // ignore
- }
- }
- }
-
- send_request(mesh, from->nexthop->connection, "%d %s %s %d %s", REQ_KEY, mesh->self->name, from->name, ANS_PUBKEY, pubkey);
- free(pubkey);
- return true;
- }
-
- case ANS_PUBKEY: {
- if(node_read_public_key(mesh, from)) {
- logger(mesh, MESHLINK_WARNING, "Got ANS_PUBKEY from %s even though we already have his pubkey", from->name);
- return true;
- }
-
- char pubkey[MAX_STRING_SIZE];
-
- if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, pubkey) != 1 || !(from->ecdsa = ecdsa_set_base64_public_key(pubkey))) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "ANS_PUBKEY", from->name, "invalid pubkey");
- return true;
- }
-
- logger(mesh, MESHLINK_INFO, "Learned ECDSA public key from %s", from->name);
- from->status.dirty = true;
-
- if(!node_write_config(mesh, from, true)) {
- // ignore
- }
-
- /* If we are trying to form an outgoing connection to this node, retry immediately */
- if(mesh->outgoing) {
- if(mesh->outgoing->node == from && mesh->outgoing->ev.cb) {
- mesh->outgoing->timeout = 0;
- timeout_set(&mesh->loop, &mesh->outgoing->ev, &(struct timespec) {
- 0, 0
- });
- }
- }
-
- /* Also reset any UTCP timers */
- utcp_reset_timers(from->utcp);
-
- return true;
- }
-
- case REQ_KEY: {
- if(!node_read_public_key(mesh, from)) {
- logger(mesh, MESHLINK_DEBUG, "No ECDSA key known for %s", from->name);
- send_request(mesh, from->nexthop->connection, "%d %s %s %d", REQ_KEY, mesh->self->name, from->name, REQ_PUBKEY);
- return true;
- }
-
- if(from->sptps.label) {
- logger(mesh, MESHLINK_DEBUG, "Got REQ_KEY from %s while we already started a SPTPS session!", from->name);
-
- if(mesh->loop.now.tv_sec < from->last_req_key + req_key_timeout && strcmp(mesh->self->name, from->name) < 0) {
- logger(mesh, MESHLINK_DEBUG, "Ignoring REQ_KEY from %s.", from->name);
- return true;
- }
- }
-
- char buf[MAX_STRING_SIZE];
- int len;
-
- if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, buf) != 1 || !(len = b64decode(buf, buf, strlen(buf)))) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "REQ_SPTPS_START", from->name, "invalid SPTPS data");
- return true;
- }
-
- char label[sizeof(meshlink_udp_label) + strlen(from->name) + strlen(mesh->self->name) + 2];
- snprintf(label, sizeof(label), "%s %s %s", meshlink_udp_label, from->name, mesh->self->name);
- sptps_stop(&from->sptps);
- from->status.validkey = false;
- from->status.waitingforkey = true;
- from->last_req_key = mesh->loop.now.tv_sec;
-
- /* Send our canonical address to help with UDP hole punching */
- send_canonical_address(mesh, from);
-
- if(!sptps_start(&from->sptps, from, false, true, mesh->private_key, from->ecdsa, label, sizeof(label) - 1, send_sptps_data, receive_sptps_record)) {
- logger(mesh, MESHLINK_ERROR, "Could not start SPTPS session with %s: %s", from->name, strerror(errno));
- return true;
- }
-
- if(!sptps_receive_data(&from->sptps, buf, len)) {
- logger(mesh, MESHLINK_ERROR, "Could not process SPTPS data from %s: %s", from->name, strerror(errno));
- return true;
- }
-
- return true;
- }
-
- case REQ_SPTPS: {
- if(!from->status.validkey) {
- logger(mesh, MESHLINK_ERROR, "Got REQ_SPTPS from %s but we don't have a valid key yet", from->name);
- return true;
- }
-
- char buf[MAX_STRING_SIZE];
- int len;
-
- if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, buf) != 1 || !(len = b64decode(buf, buf, strlen(buf)))) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "REQ_SPTPS", from->name, "invalid SPTPS data");
- return true;
- }
-
- if(!sptps_receive_data(&from->sptps, buf, len)) {
- logger(mesh, MESHLINK_ERROR, "Could not process SPTPS data from %s: %s", from->name, strerror(errno));
- return true;
- }
-
- return true;
- }
-
- case REQ_CANONICAL: {
- char host[MAX_STRING_SIZE];
- char port[MAX_STRING_SIZE];
-
- if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING " " MAX_STRING, host, port) != 2) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "REQ_CANONICAL", from->name, "invalid canonical address");
- return true;
- }
-
- char *canonical_address;
- xasprintf(&canonical_address, "%s %s", host, port);
-
- if(mesh->log_level <= MESHLINK_DEBUG && (!from->canonical_address || strcmp(from->canonical_address, canonical_address))) {
- logger(mesh, MESHLINK_DEBUG, "Updating canonical address of %s to %s", from->name, canonical_address);
- }
-
- free(from->canonical_address);
- from->canonical_address = canonical_address;
- return true;
- }
-
- default:
- logger(mesh, MESHLINK_ERROR, "Unknown extended REQ_KEY request from %s: %s", from->name, request);
- return true;
- }
-}
-
bool req_key_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
- assert(request);
- assert(*request);
-
- char from_name[MAX_STRING_SIZE];
- char to_name[MAX_STRING_SIZE];
- node_t *from, *to;
- int reqno = 0;
-
- if(sscanf(request, "%*d " MAX_STRING " " MAX_STRING " %d", from_name, to_name, &reqno) < 2) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s", "REQ_KEY", c->name);
- return false;
- }
-
- if(!check_id(from_name) || !check_id(to_name)) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "REQ_KEY", c->name, "invalid name");
- return false;
- }
-
- from = lookup_node(mesh, from_name);
-
- if(!from) {
- logger(mesh, MESHLINK_ERROR, "Got %s from %s origin %s which does not exist in our connection list",
- "REQ_KEY", c->name, from_name);
- return true;
- }
-
- to = lookup_node(mesh, to_name);
-
- if(!to) {
- logger(mesh, MESHLINK_ERROR, "Got %s from %s destination %s which does not exist in our connection list",
- "REQ_KEY", c->name, to_name);
- return true;
- }
-
- /* Check if this key request is for us */
-
- if(to == mesh->self) { /* Yes */
- /* Is this an extended REQ_KEY message? */
- if(reqno) {
- return req_key_ext_h(mesh, c, request, from, reqno);
- }
-
- /* This should never happen. Ignore it, unless it came directly from the connected peer, in which case we disconnect. */
- return from->connection != c;
- } else {
- if(!to->status.reachable || !to->nexthop || !to->nexthop->connection) {
- logger(mesh, MESHLINK_WARNING, "Got %s from %s destination %s which is not reachable",
- "REQ_KEY", c->name, to_name);
- return true;
- }
-
- send_request(mesh, to->nexthop->connection, "%s", request);
- }
-
+ (void)mesh;
+ (void)c;
+ (void)request;
return true;
}
bool ans_key_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
- assert(request);
- assert(*request);
+ (void)mesh;
(void)c;
-
- char from_name[MAX_STRING_SIZE];
- char to_name[MAX_STRING_SIZE];
- char key[MAX_STRING_SIZE];
- char address[MAX_STRING_SIZE] = "";
- char port[MAX_STRING_SIZE] = "";
- int cipher, digest, maclength, compression;
- node_t *from, *to;
-
- if(sscanf(request, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d "MAX_STRING" "MAX_STRING,
- from_name, to_name, key, &cipher, &digest, &maclength,
- &compression, address, port) < 7) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s", "ANS_KEY", c->name);
- return false;
- }
-
- if(!check_id(from_name) || !check_id(to_name)) {
- logger(mesh, MESHLINK_ERROR, "Got bad %s from %s: %s", "ANS_KEY", c->name, "invalid name");
- return false;
- }
-
- from = lookup_node(mesh, from_name);
-
- if(!from) {
- logger(mesh, MESHLINK_ERROR, "Got %s from %s origin %s which does not exist in our connection list",
- "ANS_KEY", c->name, from_name);
- return true;
- }
-
- to = lookup_node(mesh, to_name);
-
- if(!to) {
- logger(mesh, MESHLINK_ERROR, "Got %s from %s destination %s which does not exist in our connection list",
- "ANS_KEY", c->name, to_name);
- return true;
- }
-
- /* Forward it if necessary */
-
- if(to != mesh->self) {
- logger(mesh, MESHLINK_WARNING, "Got %s from %s destination %s which is not for us",
- "ANS_KEY", c->name, to_name);
- return true;
- }
-
- /* Is this an ANS_KEY informing us of our own reflexive UDP address? */
-
- if(from == mesh->self) {
- if(*key == '.' && *address && *port) {
- /* Ignore reflexive UDP address */
- } else {
- logger(mesh, MESHLINK_WARNING, "Got %s from %s from %s to %s",
- "ANS_KEY", c->name, from_name, to_name);
- }
-
- return true;
- }
-
- /* Process SPTPS data if present */
-
- if(*key != '.') {
- /* Don't use key material until every check has passed. */
- from->status.validkey = false;
-
- /* Compression is not supported. */
- if(compression != 0) {
- logger(mesh, MESHLINK_ERROR, "Node %s uses bogus compression level!", from->name);
- return true;
- }
-
- char buf[strlen(key)];
- int len = b64decode(key, buf, strlen(key));
-
- if(!len || !sptps_receive_data(&from->sptps, buf, len)) {
- logger(mesh, MESHLINK_ERROR, "Error processing SPTPS data from %s", from->name);
- }
- }
-
- if(from->status.validkey) {
- if(*address && *port) {
- /* Ignore reflexive UDP address */
- }
- }
-
+ (void)request;
return true;
-}
+}
\ No newline at end of file
projects / meshlink-tiny / blobdiff