-
- 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;
- }