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mtu cleanups

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This commit is contained in:
Nikos Mavrogiannopoulos
2013-02-08 17:26:51 +01:00
parent 14460456e7
commit 8f77d18b28
1 changed files with 17 additions and 13 deletions
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30
src/worker-vpn.c
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@@ -678,12 +678,12 @@ int l, e;
int max;
unsigned i;
struct vpn_st vinfo;
uint8_t buffer[16*1024];
uint8_t buffer[4*1024];
unsigned int buffer_size, tls_retry;
char *p;
unsigned tls_pending, dtls_pending = 0;
time_t udp_recv_time = 0;
unsigned mtu_overhead, dtls_mtu = 0;
unsigned mtu_overhead, dtls_mtu = 0, tls_mtu = 0;
if (req->cookie_set == 0) {
oclog(ws, LOG_INFO, "Connect request without authentication");
@@ -732,10 +732,6 @@ unsigned mtu_overhead, dtls_mtu = 0;
return -1;
}
if (req->cstp_mtu > 0) {
vinfo.mtu = MIN(vinfo.mtu, req->cstp_mtu);
}
tls_puts(ws->session, "HTTP/1.1 200 CONNECTED\r\n");
tls_puts(ws->session, "X-CSTP-Version: 1\r\n");
@@ -774,7 +770,13 @@ unsigned mtu_overhead, dtls_mtu = 0;
"X-CSTP-Split-Include: %s\r\n", vinfo.routes[i]);
}
tls_printf(ws->session, "X-CSTP-Keepalive: %u\r\n", ws->config->keepalive);
tls_printf(ws->session, "X-CSTP-MTU: %u\r\n", vinfo.mtu);
tls_mtu = vinfo.mtu - 8;
if (req->cstp_mtu > 0)
tls_mtu = MIN(tls_mtu, req->cstp_mtu);
tls_mtu = MIN(sizeof(buffer)-8, tls_mtu);
tls_printf(ws->session, "X-CSTP-MTU: %u\r\n", tls_mtu);
if (ws->udp_state != UP_DISABLED) {
p = (char*)buffer;
@@ -791,14 +793,16 @@ unsigned mtu_overhead, dtls_mtu = 0;
/* assume that if IPv6 is used over TCP then the same would be used over UDP */
if (ws->proto == AF_INET)
mtu_overhead = 20+8;
mtu_overhead = 20+1;
else
mtu_overhead = 40+8;
mtu_overhead = 40+1;
dtls_mtu = vinfo.mtu - mtu_overhead;
if (req->dtls_mtu > 0) {
dtls_mtu = MIN(req->dtls_mtu, dtls_mtu);
}
dtls_mtu = MIN(sizeof(buffer)-1, dtls_mtu);
tls_printf(ws->session, "X-DTLS-MTU: %u\r\n", dtls_mtu);
}
@@ -806,6 +810,7 @@ unsigned mtu_overhead, dtls_mtu = 0;
tls_puts(ws->session, "X-CSTP-Banner: Welcome\r\n");
tls_puts(ws->session, "\r\n");
for(;;) {
FD_ZERO(&rfds);
@@ -835,10 +840,10 @@ unsigned mtu_overhead, dtls_mtu = 0;
if (ws->udp_state == UP_ACTIVE) {
l = dtls_mtu;
} else {
l = sizeof(buffer);
l = tls_mtu;
}
l = read(ws->tun_fd, buffer + 8, l - 8);
l = read(ws->tun_fd, buffer + 8, l);
if (l < 0) {
e = errno;
@@ -931,7 +936,6 @@ unsigned mtu_overhead, dtls_mtu = 0;
GNUTLS_FATAL_ERR(ret);
if (ret == 0) { /* disconnect */
oclog(ws, LOG_INFO, "Client disconnected");
exit(1);
@@ -969,7 +973,7 @@ hsk_restart:
if (ret == GNUTLS_E_LARGE_PACKET) {
/* adjust mtu */
ret = mtu_not_ok(ws, &dtls_mtu);
if (dtls_mtu < 0) {
if (ret < 0) {
oclog(ws, LOG_DEBUG, "DTLS handshake failed. MTU error\n");
} else {
goto hsk_restart;