It should use vis(3), similar to this:
print-pfsync.c: cp = vis(cp, clr->ifname[i], VIS_WHITE, 0);
p...@delphinusdns.org wrote:
> >Synopsis: tcpdump/print-cdp.c allows escape codes to be sent to terminal
> >Category: system
> >Environment:
> System : OpenBSD 7.2
> Details : OpenBSD 7.2 (GENERIC.MP) #2: Thu Nov 24 23:53:03 MST 2022
>
> r...@syspatch-72-arm64.openbsd.org:/usr/src/sys/arch/arm64/compile/GENERIC.MP
>
> Architecture: OpenBSD.arm64
> Machine : arm64
> >Description:
> While trying to disturb tcpdump for the last few days (see earlier posts
> to bugs@), I came across tcpdump's CDP protocol. I was able to change the
> terminal colour of my tcpdump with a specially crafted packet (see earlier
> posts too). CDP does no filtering of what gets send and outputs everything
> from the
> wire like so:
>
> 84 switch(type) {
> 85 case 0x01:
> 86 printf(" DevID '%.*s'", len - 4, p + i + 4);
> 87 break;
>
> >How-To-Repeat:
> code-reading.
> >Fix:
> for (x = 0; x < len - 4; x++) {
> printf("%c", isprint(*(p + i + x + 4)) ? *(p + i + x + 4) :
> '.');
> }
>
> or something like that, I think we have ctypes for tcpdump. Also
> the way IP addresses are printed in this is sorta disgusting. There
> is functions for that.
>
>
> dmesg:
> OpenBSD 7.2 (GENERIC.MP) #2: Thu Nov 24 23:53:03 MST 2022
>
> r...@syspatch-72-arm64.openbsd.org:/usr/src/sys/arch/arm64/compile/GENERIC.MP
> real mem = 8432852992 (8042MB)
> avail mem = 8139448320 (7762MB)
> random: good seed from bootblocks
> mainbus0 at root: ACPI
> psci0 at mainbus0: PSCI 1.1, SMCCC 1.2
> cpu0 at mainbus0 mpidr 0: ARM Cortex-A72 r0p3
> cpu0: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
> cpu0: 1024KB 64b/line 16-way L2 cache
> cpu0: CRC32,ASID16
> cpu1 at mainbus0 mpidr 1: ARM Cortex-A72 r0p3
> cpu1: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
> cpu1: 1024KB 64b/line 16-way L2 cache
> cpu1: CRC32,ASID16
> cpu2 at mainbus0 mpidr 2: ARM Cortex-A72 r0p3
> cpu2: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
> cpu2: 1024KB 64b/line 16-way L2 cache
> cpu2: CRC32,ASID16
> cpu3 at mainbus0 mpidr 3: ARM Cortex-A72 r0p3
> cpu3: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
> cpu3: 1024KB 64b/line 16-way L2 cache
> cpu3: CRC32,ASID16
> efi0 at mainbus0: UEFI 2.7
> efi0: https://github.com/pftf/RPi4 rev 0x10000
> smbios0 at efi0: SMBIOS 3.3.0
> smbios0: vendor https://github.com/pftf/RPi4 version "UEFI Firmware v1.21"
> date 11/13/2020
> smbios0: Raspberry Pi Foundation Raspberry Pi 4 Model B
> apm0 at mainbus0
> ampintc0 at mainbus0 nirq 256, ncpu 4 ipi: 0, 1, 2: "interrupt-controller"
> agtimer0 at mainbus0: 54000 kHz
> acpi0 at mainbus0: ACPI 6.3
> acpi0: sleep states
> acpi0: tables DSDT FACP CSRT DBG2 GTDT IORT APIC PPTT BGRT
> acpi0: wakeup devices
> acpiiort0 at acpi0
> "BCM2849" at acpi0 not configured
> "BCM2835" at acpi0 not configured
> "BCM2854" at acpi0 not configured
> "ACPI0004" at acpi0 not configured
> xhci0 at acpi0 XHC0 addr 0x600000000/0x1000 irq 175, xHCI 1.0
> usb0 at xhci0: USB revision 3.0
> uhub0 at usb0 configuration 1 interface 0 "Generic xHCI root hub" rev
> 3.00/1.00 addr 1
> "ACPI0007" at acpi0 not configured
> "ACPI0007" at acpi0 not configured
> "ACPI0007" at acpi0 not configured
> "ACPI0007" at acpi0 not configured
> "ACPI0004" at acpi0 not configured
> "BCM2848" at acpi0 not configured
> "BCM2850" at acpi0 not configured
> "BCM2856" at acpi0 not configured
> "BCM2845" at acpi0 not configured
> "BCM2841" at acpi0 not configured
> "BCM2841" at acpi0 not configured
> "BCM2838" at acpi0 not configured
> "BCM2839" at acpi0 not configured
> "BCM2844" at acpi0 not configured
> pluart0 at acpi0 URT0 addr 0xfe201000/0x1000 irq 153
> "BCM2836" at acpi0 not configured
> "BCM2EA6" at acpi0 not configured
> "MSFT8000" at acpi0 not configured
> sdhc0 at acpi0 SDC1 addr 0xfe300000/0x100 irq 158
> sdhc0: base clock frequency unknown
> "BCM2855" at acpi0 not configured
> bse0 at acpi0 ETH0 addr 0xfd580000/0x10000 irq 189: address dc:a6:32:cc:db:a7
> brgphy0 at bse0 phy 1: BCM54210E 10/100/1000baseT PHY, rev. 2
> "PNP0C06" at acpi0 not configured
> acpitz0 at acpi0: critical temperature is 90 degC
> simplefb0 at mainbus0: 640x480, 32bpp
> wsdisplay0 at simplefb0 mux 1: console (std, vt100 emulation)
> wsdisplay0: screen 1-5 added (std, vt100 emulation)
> uhub1 at uhub0 port 1 configuration 1 interface 0 "VIA Labs USB2.0 Hub" rev
> 2.10/4.21 addr 2
> uhidev0 at uhub1 port 4 configuration 1 interface 0 "APC Back-UPS ES 700G
> FW:871.O4 .I USB FW:O4" rev 1.10/1.06 addr 3
> uhidev0: iclass 3/0, 146 report ids
> upd0 at uhidev0
> uhid0 at uhidev0 reportid 1: input=0, output=0, feature=1
> uhid1 at uhidev0 reportid 2: input=0, output=0, feature=1
> uhid2 at uhidev0 reportid 3: input=0, output=0, feature=1
> uhid3 at uhidev0 reportid 4: input=0, output=0, feature=1
> uhid4 at uhidev0 reportid 5: input=0, output=0, feature=1
> uhid5 at uhidev0 reportid 6: input=1, output=0, feature=1
> uhid6 at uhidev0 reportid 7: input=0, output=0, feature=2
> uhid7 at uhidev0 reportid 8: input=0, output=0, feature=2
> uhid8 at uhidev0 reportid 9: input=0, output=0, feature=2
> uhid9 at uhidev0 reportid 10: input=0, output=0, feature=1
> uhid10 at uhidev0 reportid 11: input=0, output=0, feature=1
> uhid11 at uhidev0 reportid 12: input=3, output=0, feature=3
> uhid12 at uhidev0 reportid 13: input=0, output=0, feature=1
> uhid13 at uhidev0 reportid 14: input=0, output=0, feature=1
> uhid14 at uhidev0 reportid 15: input=0, output=0, feature=1
> uhid15 at uhidev0 reportid 16: input=0, output=0, feature=1
> uhid16 at uhidev0 reportid 17: input=0, output=0, feature=1
> uhid17 at uhidev0 reportid 18: input=0, output=0, feature=1
> uhid18 at uhidev0 reportid 23: input=0, output=0, feature=2
> uhid19 at uhidev0 reportid 24: input=0, output=0, feature=1
> uhid20 at uhidev0 reportid 28: input=0, output=0, feature=3
> uhid21 at uhidev0 reportid 32: input=0, output=0, feature=2
> uhid22 at uhidev0 reportid 34: input=0, output=0, feature=1
> uhid23 at uhidev0 reportid 35: input=0, output=0, feature=2
> uhid24 at uhidev0 reportid 36: input=0, output=0, feature=2
> uhid25 at uhidev0 reportid 37: input=0, output=0, feature=2
> uhid26 at uhidev0 reportid 38: input=0, output=0, feature=2
> uhid27 at uhidev0 reportid 39: input=0, output=0, feature=1
> uhid28 at uhidev0 reportid 40: input=0, output=0, feature=4
> uhid29 at uhidev0 reportid 48: input=0, output=0, feature=2
> uhid30 at uhidev0 reportid 49: input=0, output=0, feature=2
> uhid31 at uhidev0 reportid 50: input=0, output=0, feature=2
> uhid32 at uhidev0 reportid 51: input=0, output=0, feature=2
> uhid33 at uhidev0 reportid 52: input=0, output=0, feature=1
> uhid34 at uhidev0 reportid 53: input=0, output=0, feature=1
> uhid35 at uhidev0 reportid 54: input=0, output=0, feature=1
> uhid36 at uhidev0 reportid 64: input=0, output=0, feature=1
> uhid37 at uhidev0 reportid 65: input=0, output=0, feature=2
> uhid38 at uhidev0 reportid 80: input=0, output=0, feature=1
> uhid39 at uhidev0 reportid 81: input=0, output=0, feature=1
> uhid40 at uhidev0 reportid 96: input=0, output=0, feature=2
> uhid41 at uhidev0 reportid 97: input=0, output=0, feature=1
> uhid42 at uhidev0 reportid 98: input=0, output=0, feature=4
> uhid43 at uhidev0 reportid 120: input=0, output=0, feature=1
> uhid44 at uhidev0 reportid 121: input=0, output=0, feature=1
> uhid45 at uhidev0 reportid 122: input=0, output=0, feature=4
> uhid46 at uhidev0 reportid 123: input=0, output=0, feature=2
> uhid47 at uhidev0 reportid 124: input=0, output=0, feature=1
> uhid48 at uhidev0 reportid 125: input=0, output=0, feature=1
> uhid49 at uhidev0 reportid 126: input=0, output=0, feature=1
> uhid50 at uhidev0 reportid 127: input=0, output=0, feature=1
> uhid51 at uhidev0 reportid 140: input=0, output=0, feature=1
> uhid52 at uhidev0 reportid 141: input=0, output=0, feature=1
> uhid53 at uhidev0 reportid 142: input=0, output=0, feature=1
> uhid54 at uhidev0 reportid 143: input=0, output=0, feature=1
> uhid55 at uhidev0 reportid 144: input=0, output=0, feature=1
> uhid56 at uhidev0 reportid 145: input=0, output=0, feature=2
> uhid57 at uhidev0 reportid 146: input=0, output=0, feature=2
> umass0 at uhub0 port 3 configuration 1 interface 0 "Samsung Flash Drive FIT"
> rev 3.10/11.00 addr 4
> umass0: using SCSI over Bulk-Only
> scsibus0 at umass0: 2 targets, initiator 0
> sd0 at scsibus0 targ 1 lun 0: <Samsung, Flash Drive FIT, 1100> removable
> serial.090c1000521110001360
> sd0: 244752MB, 512 bytes/sector, 501253132 sectors
> vscsi0 at root
> scsibus1 at vscsi0: 256 targets
> softraid0 at root
> scsibus2 at softraid0: 256 targets
> root on sd0a (081866428dff49a4.a) swap on sd0b dump on sd0b
> WARNING: / was not properly unmounted
> WARNING: bad clock chip time
> WARNING: CHECK AND RESET THE DATE!
>
> usbdevs:
> Controller /dev/usb0:
> addr 01: 0000:0000 Generic, xHCI root hub
> super speed, self powered, config 1, rev 1.00
> driver: uhub0
> addr 02: 2109:3431 VIA Labs, USB2.0 Hub
> high speed, self powered, config 1, rev 4.21
> driver: uhub1
> addr 03: 051d:0002 APC, Back-UPS ES 700G FW:871.O4 .I USB FW:O4
> low speed, power 2 mA, config 1, rev 1.06, iSerial 5B1936T42959
> driver: uhidev0
> addr 04: 090c:1000 Samsung, Flash Drive FIT
> super speed, power 76 mA, config 1, rev 11.00, iSerial 0319521110001360
> driver: umass0
>
