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NetBSD/sys/net
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scw 2346befecc If the underlying link's MTU is less than PP_MTU (e.g. PPPoE), set our 
MRU to the link's MTU and initiate an MRU negotiation with the peer.

This is useful when the PPP session is bridged from Ethernet to ATM
by an ADSL modem (such as the Linksys AM200). Unless we negotiate the
lower MRU, the peer is unaware that 1500-byte packets will not make
it umolested across the link (the Linksys AM200 silently truncates them
to 1498 bytes, creating a nice PMTU blackhole).

Note that the PPP RFC says peers MUST accept 1500 byte packets,
regardless of the negotiated MRU, so most ISPs which use PPPoA will
probably still send 1500-byte packets. However, I persuaded my ISP
(Andrews and Arnold) to modify their software to generate an ICMP error
"fragment needed" for packets with IP.DF set which are larger than the
negotiated MRU. They will still forward non-IP.DF packets, with the
associated truncation, but at least my PMTU troubles have gone.
2007-06-23 08:45:25 +00:00
..
agr use mutex. 2007-05-20 07:57:03 +00:00
bpf_filter.c Use be16dec() and be32dec() instead of reimplementing them. 2007-01-27 07:16:01 +00:00
bpf.c Move the nasty ifdefs in one place. Requested by ad and dyoung. 2007-05-30 21:02:02 +00:00
bpf.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
bpfdesc.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
bridgestp.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
bsd-comp.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
dlt.h add missing DLTs from the libpcap-0.9.4 distribution 2006-02-27 14:22:26 +00:00
ethertypes.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
files.pf merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
if_arc.h argument type conflict. 2005-12-14 00:28:08 +00:00
if_arcsubr.c Remove unused #define SIN(). From he@. 2007-02-19 21:18:23 +00:00
if_arp.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_atm.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
if_atmsubr.c Add IPv6 Fast Forward - the IPv4 counterpart: 2007-03-07 22:20:04 +00:00
if_bridge.c Pass an ipl argument to pool_init/POOL_INIT to be used when initializing 2007-03-12 18:18:22 +00:00
if_bridgevar.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_dl.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
if_eco.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
if_ecosubr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_ether.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_etherip.c Move the nasty ifdefs in one place. Requested by ad and dyoung. 2007-05-30 21:02:02 +00:00
if_etherip.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
if_ethersubr.c Add a sockaddr_storage member to "struct ifreq" maintaining backwards 2007-05-29 21:32:27 +00:00
if_faith.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_faith.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
if_fddi.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_fddisubr.c Add IPv6 Fast Forward - the IPv4 counterpart: 2007-03-07 22:20:04 +00:00
if_gif.c Free the route cache after detaching the interface w/ if_detach() 2007-05-06 02:15:34 +00:00
if_gif.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
if_gre.c Move the nasty ifdefs in one place. Requested by ad and dyoung. 2007-05-30 21:02:02 +00:00
if_gre.h Switch from spl(9) to mutex(9) and condvar(9). 2007-05-06 02:47:52 +00:00
if_hippi.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_hippisubr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_ieee1394.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_ieee1394subr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_llc.h define some more magic LLC constants 2006-12-10 11:35:36 +00:00
if_loop.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_media.c Add a sockaddr_storage member to "struct ifreq" maintaining backwards 2007-05-29 21:32:27 +00:00
if_media.h Add IFM_10G_SR and IFM_10G_CX4, to keep in sync with FreeBSD. 2006-06-03 12:43:28 +00:00
if_ppp.c Add IPv6 Fast Forward - the IPv4 counterpart: 2007-03-07 22:20:04 +00:00
if_ppp.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
if_pppoe.c caddr_t fallout (only visible with options PPPOE_SERVER) 2007-03-31 11:00:23 +00:00
if_pppoe.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_pppvar.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_sl.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_slvar.h merge FreeBSD timecounters from branch simonb-timecounters 2006-06-07 22:33:33 +00:00
if_sppp.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
if_spppsubr.c If the underlying link's MTU is less than PP_MTU (e.g. PPPoE), set our 2007-06-23 08:45:25 +00:00
if_spppvar.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
if_srt.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_srt.h Add RCS Id. 2006-12-29 10:39:59 +00:00
if_stf.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
if_stf.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
if_strip.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_stripvar.h merge FreeBSD timecounters from branch simonb-timecounters 2006-06-07 22:33:33 +00:00
if_tap.c Move the nasty ifdefs in one place. Requested by ad and dyoung. 2007-05-30 21:02:02 +00:00
if_tap.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
if_token.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_tokensubr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_tun.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_tun.h Change the number of TUN[GS]IFHEAD to avoid collision with if_pp. 2006-04-04 11:23:59 +00:00
if_types.h Integrate Common Address Redundancy Procotol (CARP) from OpenBSD 2006-05-18 09:05:49 +00:00
if_vlan.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
if_vlanvar.h merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
if.c Get rid of radix_node_head.rnh_walktree, because it is only ever 2007-06-09 03:07:21 +00:00
if.h Add a sockaddr_storage member to "struct ifreq" maintaining backwards 2007-05-29 21:32:27 +00:00
Makefile Install <net/if_pflog.h>. 2007-01-13 14:13:53 +00:00
net_osdep.h Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
netisr_dispatch.h remove more vestiges of CCITT, LLC, HDLC, NS, and NSIP. 2006-09-07 02:40:31 +00:00
netisr.h remove more vestiges of CCITT, LLC, HDLC, NS, and NSIP. 2006-09-07 02:40:31 +00:00
pfil.c merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
pfil.h Change "inline" back to "__inline" in .h files -- C99 is still too 2006-02-16 20:17:12 +00:00
pfkeyv2.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
ppp_defs.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
ppp_tty.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
ppp-comp.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
ppp-deflate.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
radix.c Remove unnecessary __UNCONST(). 2007-06-13 05:08:02 +00:00
radix.h Get rid of radix_node_head.rnh_walktree, because it is only ever 2007-06-09 03:07:21 +00:00
raw_cb.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
raw_cb.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
raw_usrreq.c Cosmetic: make the macro 'equal' into an inline subroutine, bcmp 2007-05-06 06:21:26 +00:00
route.c Get rid of radix_node_head.rnh_walktree, because it is only ever 2007-06-09 03:07:21 +00:00
route.h Get rid of radix_node_head.rnh_walktree, because it is only ever 2007-06-09 03:07:21 +00:00
rtsock.c Get rid of radix_node_head.rnh_walktree, because it is only ever 2007-06-09 03:07:21 +00:00
slcompress.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
slcompress.h ANSI function decls and application of static. 2005-12-11 23:05:24 +00:00
slip.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:21:38 +00:00
zlib.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
zlib.h zlib 1.2.3 changed the include protection variable names; adjust. 2006-01-14 20:17:12 +00:00