DEV: flags: add a script to decode most flags in the "show sess all" output
This ugly script decodes most flags in the "show sess all" output and
summarizes them after each stream in an aligned format that makes it
relatively easy to spot the ones of interest. It relies on "flags", and
if not found in various places, will replace its output with a copy-
pastable command that will produce it. h3/quic are not covered yet.
In order to compact the output format, the front and back stream conns
and connections are noted "f.sc", "f.co", "f.h1s", "b.co" etc. That's
sufficiently understandable and entries are grouped by context anyway.
Example of output:
0x7f51a43f7e30: [09/May/2023:20:28:57.183945] id=53704 proto=tcpv4 source=xx.xx.xx.xx:xxxx
flags=0x100c4a, conn_retries=0, conn_exp=<NEVER> conn_et=0x000 srv_conn=0x464e4e0, pend_pos=(nil) waiting=0 epoch=0xa2
frontend=public (id=2 mode=http), listener=SSL (id=4) addr=xx.xx.xx.xx:443
backend=static (id=7 mode=http) addr=xx.xx.xx.xx:50916
server=srv1 (id=1) addr=xx.xx.xx.xx:80
task=0x7f51a42190a0 (state=0x00 nice=0 calls=2 rate=0 exp=59s tid=1(1/1) age=0s)
txn=0x7f51a4397300 flags=0x43000 meth=1 status=200 req.st=MSG_DONE rsp.st=MSG_DATA req.f=0x4c rsp.f=0x0d
scf=0x57af8b0 flags=0x00000482 state=EST endp=CONN,0x7f51a4269fa0,0x04005001 sub=3 rex=59s wex=59s
h2s=0x7f51a4269fa0 h2s.id=1 .st=HCR .flg=0x207001 .rxbuf=0@(nil)+0/0
.sc=0x57af8b0(.flg=0x00000482 .app=0x7f51a43f7e30) .sd=0x5832eb0(.flg=0x04005001)
.subs=0x57af8c8(ev=3 tl=0x7f51a40dd390 tl.calls=4 tl.ctx=0x57af8b0 tl.fct=sc_conn_io_cb)
h2c=0x7f51a44144d0 h2c.st0=FRH .err=0 .maxid=1 .lastid=-1 .flg=0x0200 .nbst=1 .nbsc=1
.fctl_cnt=0 .send_cnt=1 .tree_cnt=1 .orph_cnt=0 .sub=3 .dsi=0 .dbuf=0@(nil)+0/0
.mbuf=[3..4|32],h=[32730@0x57ec920+16431/32768],t=[32730@0x7f51a4322660+16431/32768] .task=0x5722d40 .exp=<NEVER>
co0=0x5727120 ctrl=tcpv4 xprt=SSL mux=H2 data=STRM target=LISTENER:0x1cc62d0
flags=0x80000300 fd=30 fd.state=411 updt=0 fd.tmask=0x2
scb=0x7f51a4064710 flags=0x00001211 state=EST endp=CONN,0x7f51a433eb50,0x011c0001 sub=0 rex=59s wex=<NEVER>
h1s=0x7f51a433eb50 h1s.flg=0x4094 .sd.flg=0x11c0001 .req.state=MSG_DONE .res.state=MSG_DATA
.meth=GET status=200 .sd.flg=0x011c0001 .sc.flg=0x00001211 .sc.app=0x7f51a43f7e30 .subs=(nil)
h1c=0x7f51a4218b70 h1c.flg=0x80000020 .sub=0 .ibuf=32704@0x57d48c0+56/32768 .obuf=0@(nil)+0/0 .task=0x7f51a408ebb0 .exp=<NEVER>
co1=0x57264e0 ctrl=tcpv4 xprt=RAW mux=H1 data=STRM target=SERVER:0x464e4e0
flags=0x00000300 fd=26 fd.state=10122 updt=0 fd.tmask=0x2
req=0x7f51a43f7e50 (f=0x21840000 an=0x48000 pipe=0 tofwd=0 total=142)
an_exp=<NEVER> buf=0x7f51a43f7e58 data=(nil) o=0 p=0 i=0 size=0
htx=0x818e40 flags=0x0 size=0 data=0 used=0 wrap=NO extra=0
res=0x7f51a43f7ea0 (f=0xa0040101 an=0x24000000 pipe=0 tofwd=-1 total=163472)
an_exp=<NEVER> buf=0x7f51a43f7ea8 data=0x7f51a43c2f50 o=16328 p=16328 i=16440 size=32768
htx=0x7f51a43c2f50 flags=0x0 size=32720 data=16328 used=1 wrap=NO extra=3852188
-----------------------------------
task.state 0 0
txn.meth 1 GET
txn.flg 0x43000 TX_NOT_FIRST TX_CACHE_COOK TX_CACHEABLE
txn.req.flg 0x4c HTTP_MSGF_BODYLESS HTTP_MSGF_VER_11 HTTP_MSGF_XFER_LEN
txn.rsp.flg 0xd HTTP_MSGF_VER_11 HTTP_MSGF_XFER_LEN HTTP_MSGF_CNT_LEN
f.sc.flg 0x482 SC_FL_RCV_ONCE SC_FL_WONT_READ SC_FL_EOI
f.sc.sd.flg 0x4005001 SE_FL_HAVE_NO_DATA SE_FL_EOI SE_FL_NOT_FIRST SE_FL_T_MUX
f.h2s.flg 0x207001 H2_SF_MORE_HTX_DATA H2_SF_HEADERS_RCVD H2_SF_OUTGOING_DATA H2_SF_HEADERS_SENT H2_SF_ES_RCVD
f.h2s.sd.flg 0x4005001 SE_FL_HAVE_NO_DATA SE_FL_EOI SE_FL_NOT_FIRST SE_FL_T_MUX
f.h2c.flg 0x200 H2_CF_DEM_SHORT_READ
f.co.flg 0x80000300 CO_FL_XPRT_TRACKED CO_FL_XPRT_READY CO_FL_CTRL_READY
f.co.fd.st 0x19b FD_POLL_IN FD_EV_ERR_RW FD_EV_READY_R FD_EV_ACTIVE_W FD_EV_ACTIVE_R 0x8
b.sc.flg 0x1211 SC_FL_SND_NEVERWAIT SC_FL_NEED_ROOM SC_FL_NOHALF SC_FL_ISBACK
b.sc.sd.flg 0x11c0001 SE_FL_WAIT_DATA SE_FL_WANT_ROOM SE_FL_RCV_MORE SE_FL_MAY_SPLICE SE_FL_T_MUX
b.h1s.sd.flg 0x11c0001 SE_FL_WAIT_DATA SE_FL_WANT_ROOM SE_FL_RCV_MORE SE_FL_MAY_SPLICE SE_FL_T_MUX
b.h1s.flg 0x4094 H1S_F_HAVE_O_CONN H1S_F_NOT_FIRST H1S_F_WANT_KAL H1S_F_RX_CONGESTED
b.h1c.flg 0x80000020 H1C_F_IS_BACK H1C_F_IN_FULL
b.co.flg 0x300 CO_FL_XPRT_READY CO_FL_CTRL_READY
b.co.fd.st 0x278a FD_POLL_OUT FD_POLL_PRI FD_POLL_IN FD_EV_ERR_RW FD_EV_READY_R 0x2008
req.flg 0x21840000 CF_FLT_ANALYZE CF_DONT_READ CF_AUTO_CONNECT CF_WROTE_DATA
req.ana 0x48000 AN_REQ_FLT_END AN_REQ_HTTP_XFER_BODY
req.htx.flg 0 0
res.flg 0xa0040101 CF_ISRESP CF_FLT_ANALYZE CF_WROTE_DATA CF_WRITE_EVENT CF_READ_EVENT
res.ana 0x24000000 AN_RES_FLT_END AN_RES_HTTP_XFER_BODY
res.htx.flg 0 0
-----------------------------------
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