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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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4
Changes
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@ -1,7 +1,9 @@
* Fri Dec 16 2005 Brendan O'Dea <bod@optus.net> 2.1.15 * Mon Dec 19 2005 Brendan O'Dea <bod@optus.net> 2.1.15
- Drop backtrace. - Drop backtrace.
- Reduce logging of LCP EchoReply packets. - Reduce logging of LCP EchoReply packets.
- Break LCP configure loop with shutdown. - Break LCP configure loop with shutdown.
- Limit value of MRU of 1492 (rfc2516).
- Tun MTU should be MRU (not MRU+4).
* Fri Dec 9 2005 Brendan O'Dea <bod@optus.net> 2.1.14 * Fri Dec 9 2005 Brendan O'Dea <bod@optus.net> 2.1.14
- Run PLUGIN_RADIUS_ACCOUNT for Start records. - Run PLUGIN_RADIUS_ACCOUNT for Start records.

13
l2tpns.c
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@ -4,7 +4,7 @@
// Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
// vim: sw=8 ts=8 // 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 <arpa/inet.h>
#include <assert.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)); LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
exit(1); exit(1);
} }
/* set MTU to modem MRU + 4 (tun header) */ /* set MTU to modem MRU */
ifr.ifr_mtu = MRU + 4; ifr.ifr_mtu = MRU;
if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0) if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0)
{ {
LOG(0, 0, 0, "Error setting tun MTU: %s\n", strerror(errno)); 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; if (amagic == 0) amagic = time_now;
session[s].magic = amagic; // set magic number session[s].magic = amagic; // set magic number
session[s].flags = aflags; // set flags received session[s].flags = aflags; // set flags received
session[s].mru = PPPMTU; // default session[s].mru = PPPoE_MRU; // default
controlnull(t); // ack controlnull(t); // ack
// start LCP // 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 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 #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 < MINMTU) config->l2tp_mtu = MINMTU;
else if (config->l2tp_mtu > MAXMTU) config->l2tp_mtu = MAXMTU; else if (config->l2tp_mtu > MAXMTU) config->l2tp_mtu = MAXMTU;
// reset MRU/MSS globals // reset MRU/MSS globals
MRU = config->l2tp_mtu - L2TP_HDRS; MRU = config->l2tp_mtu - L2TP_HDRS;
if (MRU > PPPoE_MRU)
MRU = PPPoE_MRU;
MSS = MRU - TCP_HDRS; MSS = MRU - TCP_HDRS;
// Update radius // Update radius

4
l2tpns.h
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@ -1,5 +1,5 @@
// L2TPNS Global Stuff // L2TPNS Global Stuff
// $Id: l2tpns.h,v 1.107 2005/12/14 02:19:15 bodea Exp $ // $Id: l2tpns.h,v 1.108 2005/12/19 06:08:43 bodea Exp $
#ifndef __L2TPNS_H__ #ifndef __L2TPNS_H__
#define __L2TPNS_H__ #define __L2TPNS_H__
@ -31,8 +31,8 @@
#define MAXCONTROL 1000 // max length control message we ever send... #define MAXCONTROL 1000 // max length control message we ever send...
#define MINMTU 576 // minimum recommended MTU (rfc1063) #define MINMTU 576 // minimum recommended MTU (rfc1063)
#define PPPMTU 1500 // default PPP MTU
#define MAXMTU 2600 // arbitrary maximum MTU #define MAXMTU 2600 // arbitrary maximum MTU
#define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
#define MAXETHER (MAXMTU+18) // max packet we try sending to tun #define MAXETHER (MAXMTU+18) // max packet we try sending to tun
#define MAXTEL 96 // telephone number #define MAXTEL 96 // telephone number
#define MAXUSER 128 // username #define MAXUSER 128 // username

2
l2tpns.spec
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@ -43,5 +43,5 @@ rm -rf %{buildroot}
%attr(644,root,root) /usr/share/man/man[58]/* %attr(644,root,root) /usr/share/man/man[58]/*
%changelog %changelog
* Fri Dec 16 2005 Brendan O'Dea <bod@optus.net> 2.1.15-1 * Mon Dec 19 2005 Brendan O'Dea <bod@optus.net> 2.1.15-1
- 2.1.15 release, see /usr/share/doc/l2tpns-2.1.15/Changes - 2.1.15 release, see /usr/share/doc/l2tpns-2.1.15/Changes