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fix session MRU, tunnel MTU

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bodea 2005-12-19 06:08:42 +00:00
parent 225f5be34c
commit 31e24f76ce
4 changed files with 14 additions and 9 deletions
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13
l2tpns.c
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@ -4,7 +4,7 @@
// Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
// vim: sw=8 ts=8
char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.152 2005/12/14 02:19:15 bodea Exp $";
char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.153 2005/12/19 06:08:42 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
@ -554,8 +554,8 @@ static void inittun(void)
LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
exit(1);
}
/* set MTU to modem MRU + 4 (tun header) */
ifr.ifr_mtu = MRU + 4;
/* set MTU to modem MRU */
ifr.ifr_mtu = MRU;
if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0)
{
LOG(0, 0, 0, "Error setting tun MTU: %s\n", strerror(errno));
@ -2463,7 +2463,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
if (amagic == 0) amagic = time_now;
session[s].magic = amagic; // set magic number
session[s].flags = aflags; // set flags received
session[s].mru = PPPMTU; // default
session[s].mru = PPPoE_MRU; // default
controlnull(t); // ack
// start LCP
@ -4295,12 +4295,15 @@ static void update_config()
#define L2TP_HDRS (20+8+6+4) // L2TP data encaptulation: ip + udp + l2tp (data) + ppp (inc hdlc)
#define TCP_HDRS (20+20) // TCP encapsulation: ip + tcp
if (config->l2tp_mtu <= 0) config->l2tp_mtu = PPPMTU;
if (config->l2tp_mtu <= 0) config->l2tp_mtu = 1500; // ethernet default
else if (config->l2tp_mtu < MINMTU) config->l2tp_mtu = MINMTU;
else if (config->l2tp_mtu > MAXMTU) config->l2tp_mtu = MAXMTU;
// reset MRU/MSS globals
MRU = config->l2tp_mtu - L2TP_HDRS;
if (MRU > PPPoE_MRU)
MRU = PPPoE_MRU;
MSS = MRU - TCP_HDRS;
// Update radius