Hi,
I am trying to get snmpd running on an ARM (cross compile config
below) chip and consistently see the snmpd daemon "give up" and
not process the packet. The behavior is consistent across all transports
(including UNIX) and from both the local machine and a remote linux client
(udp and tcp).
Below the most recent client, agent, .conf and configure info, the latter
which I got from a previously posted question on building for ARM. I've
read the FAQ (how else could I get the debug strings?!) and I've looked
through the code myself and nothing jumps out at me.
Everything seems to be working, loading, it just doesn't process the
packets. The only possibly relevant clue is that while the
"sess_process_package" reqid seems right, the message id is always 0. But
that may just be because the server will assign it. what look like
loopback tests fill up the log when I specify -DALL.
I've been hitting my head against this for two days now. I hope it's
painfully obvious.
Thanks for a great package and thanks for your help!
Dave
CLIENT COMMAND:
./snmpwalk -M /root/mibs -c rocommunity -v 2c -r 0 -d localhost -DALL
Note: I have tried many possible variations on that command, including -u
test, -v 1, protected and public ports, etc.
[snip snip]
sess_process_packet: sending message id#2039961885 reqid#467162415 len 45
transport:send: 45 bytes to UDP: [127.0.0.1]:161->[0.0.0.0]:0
Sending 45 bytes to UDP: [127.0.0.1]:161->[0.0.0.0]:0
0000: 30 2B 02 01 00 04 0B 72 6F 63 6F 6D 6D 75 6E 69 0+.....rocommuni
0016: 74 79 A1 19 02 04 1B D8 55 2F 02 01 00 02 01 00 ty......U/......
0032: 30 0B 30 09 06 05 2B 06 01 02 01 05 00 0.0...+......
trace: netsnmp_udpbase_send(): transports/snmpUDPBaseDomain.c, 330:
netsnmp_udp: send 45 bytes from 0xe966b to UDP:
[127.0.0.1]:161->[0.0.0.0]:0 on fd 3
trace: snmp_sess_select_info2_flags(): snmp_api.c, 6325:
sess_select: for all sessions: 3 (to in 946686840.542523 sec)
verbose:sess_select: timer due in 0.999476 sec
verbose:sess_select: setting timer to 0.999476 sec, clear block (was 1)
trace: snmp_synch_input(): snmp_client.c, 176:
snmp_synch: Response (ReqID: 467162415 - Cmd 161)
Timeout: No Response from localhost
AGENT:
Invocation:
./snmpd -M /root/mibs -f -Lf ./snmpd.log -c snmpd.test.conf
-Dsnmpd,transport_callback,sess_read,sess_process_packet,sess_select,ip_interface,recv,snmp_api,snmp_parse
&
Logging of (non)event:
snmpd/select: returned, count = 1
sess_process_packet: session 0x241570 fd 8 pkt 0x27bfc8 length 45
snmp_api: Parsing SNMPv2 message...
sess_process_packet: received message id#0 reqid#1592707923 len 45
sess_read: not reading 6 (fdset 0xbec7ca68 set 0)
sess_read: not reading 7 (fdset 0xbec7ca68 set 0)
sess_read: not reading 4 (fdset 0xbec7ca68 set 0)
sess_select: for all sessions: 8 6 7 4
sess_select: next alarm at 946687334.544205 sec
snmpd/select: select( numfds=9, ..., tvp=0xbec7cb70)
snmpd/select: returned, count = 0
sess_select: for all sessions: 8 6 7 4
...
AGENT CONFIG:
I have also tested with -rocommunity "test default" (or whatever).
# egrep -v '^\w*#|^\w*$' snmpd.test.conf
agentAddress udp:1161
rocommunity public
sysLocation Ninth Circle of Hell
sysContact Dave <d...@powerstandards.com>
# Application +
End-to-End layers
sysServices 72
# At least one 'mountd' process
proc stunnel
proc /usr/sbin/dropbear
# 10MBs required on root disk, 5% free on
/var, 10% free on all other disks
disk / 10000
disk /var 5%
includeAllDisks 10%
# Unacceptable 1-, 5-, and 15-minute load
averages
load 12 10 5
CONFIGURE:
This has been attempted with innumerable options, including "endianess"
(tried both) and various versions of the "host, build and target" options,
and even "re-entrant". This is the configuration that printed out the log
messages above, as they all seem to.
./configure --enable-mini-agent \
--with-mib-modules="mibII ucd_snmp" \
--enable-static --disable-shared \
--prefix=`pwd`/install --exec_prefix=`pwd`/install-arm \
--host=arm-none-linux-gnueabi --target=arm-none-linux-gnueabi
--build=i686-linux \
--with-cc=arm-none-linux-gnueabi-gcc \
--with-linkcc=arm-none-linux-gnueabi-gcc \
--with-ld=arm-none-linux-gnueabi-ld \
--with-ar=arm-none-linux-gnueabi-ar \
--with-sys-contact="d...@powerstandards.com" \
--with-sys-location="ip-psl" --with-default-snmp-version="2" \
--with-logfile="/var/log/snmpd.log" \
--with-persistent-directory="/var/net-snmp" \
--without-rpm --disable-embedded-perl --disable-deprecated
--disable-manuals --disable-ipv6
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