bool id_h(connection_t *c, const char *request) {
char name[MAX_STRING_SIZE];
if(sscanf(request, "%*d " MAX_STRING " %d.%d", name, &c->protocol_major, &c->protocol_minor) < 2) {
logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ID", c->name,
c->hostname);
return false;
}
/* Check if this is a control connection */
if(name[0] == '^' && !strcmp(name + 1, controlcookie)) {
c->status.control = true;
c->allow_request = CONTROL;
c->last_ping_time = now.tv_sec + 3600;
free(c->name);
c->name = xstrdup("<control>");
return send_request(c, "%d %d %d", ACK, TINC_CTL_VERSION_CURRENT, getpid());
}
if(name[0] == '?') {
if(!invitation_key) {
logger(DEBUG_ALWAYS, LOG_ERR, "Got invitation from %s but we don't have an invitation key", c->hostname);
return false;
}
c->ecdsa = ecdsa_set_base64_public_key(name + 1);
if(!c->ecdsa) {
logger(DEBUG_ALWAYS, LOG_ERR, "Got bad invitation from %s", c->hostname);
return false;
}
c->status.invitation = true;
char *mykey = ecdsa_get_base64_public_key(invitation_key);
if(!mykey)
return false;
if(!send_request(c, "%d %s", ACK, mykey))
return false;
free(mykey);
c->protocol_minor = 2;
return sptps_start(&c->sptps, c, false, false, invitation_key, c->ecdsa, "tinc invitation", 15, send_meta_sptps, receive_invitation_sptps);
}
/* Check if identity is a valid name */
if(!check_id(name)) {
logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "ID", c->name,
c->hostname, "invalid name");
return false;
}
/* If this is an outgoing connection, make sure we are connected to the right host */
if(c->outgoing) {
if(strcmp(c->name, name)) {
logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s is %s instead of %s", c->hostname, name,
c->name);
return false;
}
} else {
if(c->name)
free(c->name);
c->name = xstrdup(name);
}
/* Check if version matches */
if(c->protocol_major != myself->connection->protocol_major) {
logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s (%s) uses incompatible version %d.%d",
c->name, c->hostname, c->protocol_major, c->protocol_minor);
return false;
}
if(bypass_security) {
if(!c->config_tree)
init_configuration(&c->config_tree);
c->allow_request = ACK;
return send_ack(c);
}
if(!experimental)
c->protocol_minor = 0;
if(!c->config_tree) {
init_configuration(&c->config_tree);
if(!read_host_config(c->config_tree, c->name)) {
logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s had unknown identity (%s)", c->hostname, c->name);
return false;
}
if(experimental)
read_ecdsa_public_key(c);
/* Ignore failures if no key known yet */
}
if(c->protocol_minor && !ecdsa_active(c->ecdsa))
c->protocol_minor = 1;
/* Forbid version rollback for nodes whose Ed25519 key we know */
if(ecdsa_active(c->ecdsa) && c->protocol_minor < 2) {
logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s (%s) tries to roll back protocol version to %d.%d",
c->name, c->hostname, c->protocol_major, c->protocol_minor);
return false;
}
c->allow_request = METAKEY;
if(c->protocol_minor >= 2) {
c->allow_request = ACK;
char label[25 + strlen(myself->name) + strlen(c->name)];
if(c->outgoing)
snprintf(label, sizeof label, "tinc TCP key expansion %s %s", myself->name, c->name);
else
snprintf(label, sizeof label, "tinc TCP key expansion %s %s", c->name, myself->name);
return sptps_start(&c->sptps, c, c->outgoing, false, myself->connection->ecdsa, c->ecdsa, label, sizeof label, send_meta_sptps, receive_meta_sptps);
} else {
return send_metakey(c);
}
}
bool id_h(connection_t *c) {
char name[MAX_STRING_SIZE];
if(sscanf(c->buffer, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
logger(LOG_ERR, "Got bad %s from %s (%s)", "ID", c->name,
c->hostname);
return false;
}
/* Check if identity is a valid name */
if(!check_id(name) || !strcmp(name, myself->name)) {
logger(LOG_ERR, "Got bad %s from %s (%s): %s", "ID", c->name,
c->hostname, "invalid name");
return false;
}
/* If this is an outgoing connection, make sure we are connected to the right host */
if(c->outgoing) {
if(strcmp(c->name, name)) {
logger(LOG_ERR, "Peer %s is %s instead of %s", c->hostname, name,
c->name);
return false;
}
} else {
if(c->name) {
free(c->name);
}
c->name = xstrdup(name);
}
/* Check if version matches */
if(c->protocol_version != myself->connection->protocol_version) {
logger(LOG_ERR, "Peer %s (%s) uses incompatible version %d",
c->name, c->hostname, c->protocol_version);
return false;
}
if(bypass_security) {
if(!c->config_tree) {
init_configuration(&c->config_tree);
}
c->allow_request = ACK;
if(!c->outgoing) {
send_id(c);
}
return send_ack(c);
}
if(!c->config_tree) {
init_configuration(&c->config_tree);
if(!read_connection_config(c)) {
logger(LOG_ERR, "Peer %s had unknown identity (%s)", c->hostname,
c->name);
return false;
}
}
if(!read_rsa_public_key(c)) {
return false;
}
c->allow_request = METAKEY;
if(!c->outgoing) {
send_id(c);
}
return send_metakey(c);
}
