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better calculation of suggested to the peer MTU

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This commit is contained in:
Nikos Mavrogiannopoulos
2013-09-30 11:30:18 +02:00
parent ae0ee4f49b
commit b3b3292ec8
1 changed files with 5 additions and 3 deletions
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8
src/worker-vpn.c
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@@ -971,8 +971,9 @@ socklen_t sl;
oclog(ws, LOG_INFO, "reducing DTLS MTU to peer's DTLS MTU (%u)", req->dtls_mtu);
}
overhead = tls_get_overhead(GNUTLS_DTLS0_9, ws->req.gnutls_cipher, ws->req.gnutls_mac);
overhead = CSTP_DTLS_OVERHEAD + tls_get_overhead(GNUTLS_DTLS0_9, ws->req.gnutls_cipher, ws->req.gnutls_mac);
tls_printf(ws->session, "X-DTLS-MTU: %u\r\n", ws->conn_mtu-overhead);
oclog(ws, LOG_INFO, "suggesting DTLS MTU %u", ws->conn_mtu-overhead);
}
if (ws->buffer_size <= ws->conn_mtu+mtu_overhead) {
@@ -983,11 +984,12 @@ socklen_t sl;
goto exit;
}
overhead = tls_get_overhead(gnutls_protocol_get_version(ws->session), gnutls_cipher_get(ws->session), gnutls_mac_get(ws->session));
overhead = CSTP_OVERHEAD + tls_get_overhead(gnutls_protocol_get_version(ws->session), gnutls_cipher_get(ws->session), gnutls_mac_get(ws->session));
ret = tls_printf(ws->session, "X-CSTP-MTU: %u\r\n", ws->conn_mtu-overhead);
SEND_ERR(ret);
oclog(ws, LOG_INFO, "suggesting CSTP MTU %u", ws->conn_mtu-overhead);
oclog(ws, LOG_INFO, "selected MTU is %u", ws->conn_mtu);
oclog(ws, LOG_INFO, "plaintext MTU is %u", ws->conn_mtu);
send_tun_mtu(ws, ws->conn_mtu);
if (ws->config->banner) {