Date: Tue, 14 May 2002 17:39:29 +1000 (EST) From: Cristan Szmajda <cls@cse.unsw.edu.au> To: current@freebsd.org Subject: bad tcp cksum fffe! Message-ID: <Pine.GSO.4.44.0205141701170.805-100000@mozart.orchestra.cse.unsw.EDU.AU>
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Dear freebsd-current, Any suggestions you have regarding this problem would be much appreciated. My laptop running -CURRENT is suddenly generating bad TCP checksums when talking to some IPs but not others. For example, 129.94.209.220 is a problem, 17:08:47.026823 129.94.233.200.1032 > 129.94.209.220.22: S [bad tcp cksum fffe!] 3868790363:3868790363(0) win 65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 542813 0,nop,nop,ccnew 10> (DF) (ttl 64, id 347, len 68) 17:08:50.676968 129.94.233.200.1033 > 129.94.173.109.22: S [bad tcp cksum fffe!] 3810151152:3810151152(0) win 65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 543178 0,nop,nop,ccnew 11> (DF) (ttl 64, id 348, len 68) but 129.94.242.14 is fine. 17:08:56.686832 129.94.233.200.1034 > 129.94.242.14.22: S [tcp sum ok] 2395865513:2395865513(0) win 65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 543779 0,nop,nop,ccnew 12> (DF) (ttl 64, id 349, len 68) 17:08:56.689644 129.94.242.14.22 > 129.94.233.200.1034: S [tcp sum ok] 990076085:990076085(0) ack 2395865514 win 10136 <nop,nop,timestamp 595991654 543779,nop,wscale 0,mss 1460> (ttl 254, id 7165, len 60) 17:08:56.689991 129.94.233.200.1034 > 129.94.242.14.22: . [tcp sum ok] ack 1 win 33304 <nop,nop,timestamp 543779 595991654> (DF) (ttl 64, id 350, len 52) It doesn't matter whether net.inet.tcp.rfc1323 and net.inet.tcp.rfc1644 are off or on. My dmesg is below. Thanks, -- Chris Copyright (c) 1992-2001 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.0-CURRENT #24: Tue May 14 15:34:56 EST 2002 cls@oedipus:/usr/src/sys/i386/compile/OEDIPUS Timecounter "i8254" frequency 1193182 Hz CPU: Pentium/P55C (quarter-micron) (298.42-MHz 586-class CPU) Origin = "GenuineIntel" Id = 0x582 Stepping = 2 Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX> real memory = 134152192 (131008K bytes) avail memory = 126439424 (123476K bytes) Preloaded elf kernel "kernel" at 0xc040b000. Intel Pentium detected, installing workaround for F00F bug Using $PIR table, 4 entries at 0xc00fdf80 apm0: <APM BIOS> on motherboard apm0: found APM BIOS v1.2, connected at v1.2 npx0: <math processor> on motherboard npx0: INT 16 interface pcib0: <Host to PCI bridge> at pcibus 0 on motherboard pci0: <PCI bus> on pcib0 isab0: <PCI-ISA bridge> at device 7.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX4 ATA33 controller> port 0xfcf0-0xfcff at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 uhci0: <Intel 82371AB/EB (PIIX4) USB controller> at device 7.2 on pci0 uhci0: Could not map ports device_probe_and_attach: uhci0 attach returned 6 pci0: <bridge, PCI-unknown> at 7.3 (no driver attached) pci0: <display, VGA> at 8.0 (no driver attached) pci0: <serial bus, FireWire> at 9.0 (no driver attached) pci_cfgintr_unique: hard-routed to irq 9 pci_cfgintr: 0:10 INTA routed to irq 9 pcic0: <Ricoh RL5C475 PCI-CardBus Bridge> irq 9 at device 10.0 on pci0 pcic0: PCI Memory allocated: 0x44000000 pccard0: <PC Card bus (classic)> on pcic0 orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0 atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0 atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 psm0: <PS/2 Mouse> irq 12 on atkbdc0 psm0: model VersaPad, device ID 0 fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 pmtimer0 on isa0 ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0 ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode ppc0: FIFO with 16/16/8 bytes threshold lpt0: <Printer> on ppbus0 lpt0: Interrupt-driven port ppi0: <Parallel I/O> on ppbus0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 unknown: <PNP0303> can't assign resources sbc0: <ESS ES1879> at port 0x220-0x22f,0x388-0x38b,0x320-0x321 irq 5 drq 1,5 on isa0 pcm0: <ESS 18xx DSP> on sbc0 midi0: <SB Midi Interface> on sbc0 midi1: <SB OPL FM Synthesizer> on sbc0 unknown: <PNP0700> can't assign resources unknown: <PNP0401> can't assign resources unknown: <PNP0501> can't assign resources unknown: <ROK0010> can't assign resources unknown: <PNP0f13> can't assign resources IP packet filtering initialized, divert enabled, rule-based forwarding enabled, default to deny, logging limited to 1000 packets/entry by default IPv6 packet filtering initialized, logging limited to 1000 packets/entry IPsec: Initialized Security Association Processing. ad0: 6194MB <TOSHIBA MK6412MAT> [13424/15/63] at ata0-master UDMA33 Mounting root from ufs:/dev/ad0s2a pccard: card inserted, slot 0 pcic0: Event mask 0x9 wi0 at port 0x240-0x27f irq 9 slot 0 on pccard0 wi0: Ethernet address: 00:02:2d:02:98:7e wi0: promiscuous mode enabled wi0: promiscuous mode disabled To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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