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Kernel Extensions and Device Support Programming Concepts

Net Subcommands for the KDB Kernel Debugger and kdb Command

ifnet Subcommand

The ifnet subcommand prints interface information, or the specified one.

Example

   KDB(0)> ifnet display interface
   SLOT  1 ---- IFNET INFO ----(@0x00325138)----
       flags:0x08080009 
           (UP|LOOPBACK)
       timer:00000  metric:00
   
               address: 127.0.0.1
       ifq_head:0x00000000  if_init():0x00000000      ipackets:00000190
       ifq_tail:0x00000000  if_output():0x00080E9C    ierrors: 00000
       ifq_len:00000        if_ioctl():0x00080E90     opackets:00000195
       ifq_maxlen:00000     if_reset():0x00000000     oerrors: 00000
       ifq_drops:00050      if_watchdog():0x00000000
   SLOT  2 ---- IFNET INFO ----(@0x05583800)----
       flags:0x08080863 
           (UP|BROADCAST|NOTRAILERS|RUNNING|CANTCHANGE)
       timer:00000  metric:00
   
               address: 129.183.67.8
       ifq_head:0x01A2CACC  if_init():0x00000000      ipackets:00003456
       ifq_tail:0x00000000  if_output():0x01A2CAA8    ierrors: 00000
       ifq_len:00000        if_ioctl():0x01A2CAC0     opackets:00000088
       ifq_maxlen:00000     if_reset():0x00000000     oerrors: 00000
       ifq_drops:00000      if_watchdog():0x00000000
   KDB(0)>

tcb Subcommand

The tcb subcommand prints TCP blocks, or the specified one.

Example

KDB(0)> tcb display TCP blocks
SLOT  1  TCB --------- INPCB  INFO ----(@0x05F4AB00)----
    next:0x05CD0E80    prev:0x01C033B8    head:0x01C033B8
    ppcb:0x05F9FF00    inp_socket:0x05FA4C00
    lport:       23    laddr:0x96B70114
    fport:     3972    faddr:0x81B7600D
---- SOCKET INFO ----(@05FA4C00)----
    typeCommandCommand.. 0001 (STREAM)
    optsCommandCommand.. 010C (REUSEADDR|KEEPALIVE|OOBINLINE)
    lingerCommandCommand 0000 stateCommandCommand. 0182 (ISCONNECTED|PRIV|NBIO)
    pcbCommand.. 05F4AB00 protoCommand 01C01F80 lockCommand. 05FB1680 headCommand. 00000000
    q0CommandCommand 00000000 qCommandCommand. 00000000 dqCommandCommand 00000000 q0lenCommandCommand. 0000
    qlenCommandCommand.. 0000 qlimitCommandCommand 0000 dqlenCommandCommand. 0000 timeoCommandCommand. 0000
    errorCommandCommand. 0000 specialCommand.. 0808 pgidCommand. 00000000 oobmark. 00000000
snd:ccCommandCommand 00000000 hiwatCommand 00004000 mbcntCommand 00000000 mbmaxCommand 00010000
    lowatCommand 00001000 mbCommandCommand 00000000 selCommand.. 00000000 eventsCommandCommand 0000
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 05FA9D00 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 00000000 flagsCommandCommand. 0000  ()
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05FB1684
rcv:ccCommandCommand 00000000 hiwatCommand 00004000 mbcntCommand 00000000 mbmaxCommand 00010000
    lowatCommand 00000001 mbCommandCommand 00000000 selCommand.. 00000000 eventsCommandCommand 0004
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 05FA4900 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 00000000 flagsCommandCommand. 0008  (SEL)
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05FB1688
(0)> more (^C to quit) ? ^C quit
KDB(0)>

udb Subcommand

The udb subcommand prints UDP blocks, or the specified one.

Example

KDB(0)> udb display UDP blocks
SLOT  1  UDB --------- INPCB  INFO ----(@0x05F31300)----
    next:0x05D21A00    prev:0x01C07170    head:0x01C07170
    ppcb:0x00000000    inp_socket:0x05F2D200
    lport:     1595    laddr:0x00000000
    fport:        0    faddr:0x00000000
---- SOCKET INFO ----(@05F2D200)----
    typeCommandCommand.. 0002 (DGRAM)
    optsCommandCommand.. 0000 ()
    lingerCommandCommand 0000 stateCommandCommand. 0080 (PRIV)
    pcbCommand.. 05F31300 protoCommand 01C01F48 lockCommand. 05F2F900 headCommand. 00000000
    q0CommandCommand 00000000 qCommandCommand. 00000000 dqCommandCommand 00000000 q0lenCommandCommand. 0000
    qlenCommandCommand.. 0000 qlimitCommandCommand 0000 dqlenCommandCommand. 0000 timeoCommandCommand. 0000
    errorCommandCommand. 0000 specialCommand.. 0808 pgidCommand. 00000000 oobmark. 00000000
snd:ccCommandCommand 00000000 hiwatCommand 00010000 mbcntCommand 00000000 mbmaxCommand 00020000
    lowatCommand 00001000 mbCommandCommand 00000000 selCommand.. 00000000 eventsCommandCommand 0000
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 00000000 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 00000000 flagsCommandCommand. 0000  ()
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05F2F904
rcv:ccCommandCommand 00000000 hiwatCommand 00010000 mbcntCommand 00000000 mbmaxCommand 00020000
    lowatCommand 00000001 mbCommandCommand 00000000 selCommand.. 00000000 eventsCommandCommand 0000
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 05D3DD00 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 0000005E flagsCommandCommand. 0000  ()
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05F2F908
(0)> more (^C to quit) ? ^C quit
KDB(0)>

sock Subcommand

The sock subcommand prints TCP UDP sockets, or the specified one. It is possible to select only one protocol: tcp or udp.

Example

KDB(0)> sock tcp display TCP sockets
---- TCP ----(inpcb: @0x05F4AB00)----
---- SOCKET INFO ----(@05FA4C00)----
    typeCommandCommand.. 0001 (STREAM)
    optsCommandCommand.. 010C (REUSEADDR|KEEPALIVE|OOBINLINE)
    lingerCommandCommand 0000 stateCommandCommand. 0182 (ISCONNECTED|PRIV|NBIO)
    pcbCommand.. 05F4AB00 protoCommand 01C01F80 lockCommand. 05FB1680 headCommand. 00000000
    q0CommandCommand 00000000 qCommandCommand. 00000000 dqCommandCommand 00000000 q0lenCommandCommand. 0000
    qlenCommandCommand.. 0000 qlimitCommandCommand 0000 dqlenCommandCommand. 0000 timeoCommandCommand. 0000
    errorCommandCommand. 0000 specialCommand.. 0808 pgidCommand. 00000000 oobmark. 00000000
snd:ccCommandCommand 00000002 hiwatCommand 00004000 mbcntCommand 00000100 mbmaxCommand 00010000
    lowatCommand 00001000 mbCommandCommand 05F2D600 selCommand.. 00000000 eventsCommandCommand 0000
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 05F2D600 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 00000000 flagsCommandCommand. 0000  ()
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05FB1684
rcv:ccCommandCommand 00000000 hiwatCommand 00004000 mbcntCommand 00000000 mbmaxCommand 00010000
    lowatCommand 00000001 mbCommandCommand 00000000 selCommand.. 00000000 eventsCommandCommand 0005
    iodone.. 00000000 ioargs.. 00000000 lastpkt. 05E1A200 wakeone. FFFFFFFF
    timerCommand 00000000 timeoCommand 00000000 flagsCommandCommand. 0008  (SEL)
    wakeup.. 00000000 wakearg. 00000000 lockCommand. 05FB1688
---- TCP ----(inpcb: @0x05CD0E80)----
---- SOCKET INFO ----(@05CABA00)----
    typeCommandCommand.. 0001 (STREAM)
(0)> more (^C to quit) ? ^C quit
KDB(0)>

tcpcb Subcommand

The tcpcb subcommand prints TCP control blocks, or the specified one.

Example

   KDB(0)> tcpcb display TCB control blocks
   ---- TCP ----(inpcb: @0x05B17F80)----
   ---- TCPCB ----(@0x05B26C00)----
     seg_next 0x05B26C00  seg_prev 0x05B26C00  t_state 0x04  (ESTABLISHED)
     timers:   TCPT_REXMT:3   TCPT_PERSIST:0   TCPT_KEEP:14400   TCPT_2MSL:0
     t_txtshift 0  t_txtcur 3  t_dupacks 0  t_maxseg 1460  t_force 0
     flags:0x0000  ()
     t_template 0x00000000  inpcb        0x00000000
     snd_cwnd:  0x00009448  snd_ssthresh:0x3FFFC000
     snd_una:   0x1EADFCA0  snd_nxt:     0x1EADFCA2  snd_up: 0x1EADFCA0
     snd=wl1:   0xE3BDEEAF  snd_wl2:     0x1EADFCA0  iss:    0x1EAD8401
     snd_wnd:   16060       rcv_wnd:     16060
     t_idle:    0x00000000  t_rtt:       0x00000001 t_rtseq: 0x1EADFCA0
     t_srtt:    0x00000007  t_rttvar:    0x00000003
     max_sndwnd:16060       t_iobc:0x00  t_oobflags:0x00 ()
   ---- TCP ----(inpcb: @0x05B2D000)----
   ---- TCPCB ----(@0x05B28300)----
     seg_next 0x05B28300  seg_prev 0x05B28300  t_state 0x04  (ESTABLISHED)
     timers:   TCPT_REXMT:0   TCPT_PERSIST:0   TCPT_KEEP:4719   TCPT_2MSL:0
     t_txtshift 0  t_txtcur 3  t_dupacks 0  t_maxseg 1460  t_force 0
     flags:0x0000  ()
     t_template 0x00000000  inpcb        0x00000000
     snd_cwnd:  0x0000111C  snd_ssthresh:0x3FFFC000
   (0)> more (^C to quit) ?^C quit 
   KDB(0)>

mbuf Subcommand

The mbuf subcommand prints TCP UDP message buffers, or the specified one. It is possible to select only one protocol: tcp or udp.

Example

KDB(0)> mbuf display message buffers
---- TCP ----(inpcb: @0x05F4AB00)----
---- SND ----(sock: @0x05FA4C00)----
mCommandCommandCommandCommandCommand 05E2E900 m_nextCommandCommandCommand. 00000000 m_nextpktCommandCommand. 00000000
m_lenCommandCommandCommand.. 00000004 m_dataCommandCommandCommand. 05E2E91C m_typeCommand.. 0001 DATA
m_flagsCommandCommandCommand 0002 (M_PKTHDR)
m_pkthdr.lenCommand. 00000004 m_pkthdr.rcvif.. 00000000
----------------------------------------------------
05E2E91C: 7566 0D0A                                    uf..
---- TCP ----(inpcb: @0x05CD0E80)----
---- TCP ----(inpcb: @0x05CA6B80)----
---- TCP ----(inpcb: @0x05EB0A00)----
---- TCP ----(inpcb: @0x05D21E00)----
---- TCP ----(inpcb: @0x05CA6880)----
---- TCP ----(inpcb: @0x05DB1F00)----
---- TCP ----(inpcb: @0x05DB1F80)----
---- TCP ----(inpcb: @0x05DB1C80)----
---- TCP ----(inpcb: @0x05DB1D00)----
---- TCP ----(inpcb: @0x05DB1D80)----
---- TCP ----(inpcb: @0x05DB1E00)----
---- TCP ----(inpcb: @0x05F31580)----
---- TCP ----(inpcb: @0x05F31900)----
---- TCP ----(inpcb: @0x05F31980)----
(0)> more (^C to quit) ? ^C quit 
KDB(0)>
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