node_t *to = handle;
to->sptps.send_data = send_sptps_data_myself;
- char buf[B64_SIZE(len)];
+ char *buf = alloca(B64_SIZE(len));
b64encode_tinc(data, buf, len);
return send_request(to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, myself->name, to->name, REQ_KEY, buf);
return true;
}
- char label[25 + strlen(myself->name) + strlen(to->name)];
- snprintf(label, sizeof(label), "tinc UDP key expansion %s %s", myself->name, to->name);
+ const size_t labellen = 25 + strlen(myself->name) + strlen(to->name);
+ char *label = alloca(labellen);
+ snprintf(label, labellen, "tinc UDP key expansion %s %s", myself->name, to->name);
+
sptps_stop(&to->sptps);
to->status.validkey = false;
to->status.waitingforkey = true;
to->last_req_key = now.tv_sec;
to->incompression = myself->incompression;
- return sptps_start(&to->sptps, to, true, true, myself->connection->ecdsa, to->ecdsa, label, sizeof(label), send_initial_sptps_data, receive_sptps_record);
+ return sptps_start(&to->sptps, to, true, true, myself->connection->ecdsa, to->ecdsa, label, labellen, send_initial_sptps_data, receive_sptps_record);
}
return send_request(to->nexthop->connection, "%d %s %s", REQ_KEY, myself->name, to->name);
return true;
}
- char label[25 + strlen(from->name) + strlen(myself->name)];
- snprintf(label, sizeof(label), "tinc UDP key expansion %s %s", from->name, myself->name);
+ const size_t labellen = 25 + strlen(from->name) + strlen(myself->name);
+ char *label = alloca(labellen);
+ snprintf(label, labellen, "tinc UDP key expansion %s %s", from->name, myself->name);
sptps_stop(&from->sptps);
from->status.validkey = false;
from->status.waitingforkey = true;
from->last_req_key = now.tv_sec;
- sptps_start(&from->sptps, from, false, true, myself->connection->ecdsa, from->ecdsa, label, sizeof(label), send_sptps_data_myself, receive_sptps_record);
+ sptps_start(&from->sptps, from, false, true, myself->connection->ecdsa, from->ecdsa, label, labellen, send_sptps_data_myself, receive_sptps_record);
sptps_receive_data(&from->sptps, buf, len);
send_mtu_info(myself, from, MTU);
return true;
return false;
#else
size_t keylen = myself->incipher ? cipher_keylength(myself->incipher) : 1;
- char key[keylen * 2 + 1];
+ char *key = alloca(keylen * 2 + 1);
randomize(key, keylen);
/* SPTPS or old-style key exchange? */
if(from->status.sptps) {
- uint8_t buf[strlen(key)];
- size_t len = b64decode_tinc(key, buf, strlen(key));
+ const size_t buflen = strlen(key);
+ uint8_t *buf = alloca(buflen);
+ size_t len = b64decode_tinc(key, buf, buflen);
if(!len || !sptps_receive_data(&from->sptps, buf, len)) {
/* Uh-oh. It might be that the tunnel is stuck in some corrupted state,