RE: How to generate v3 traps?

Hi,

I'm using net-snmp 5.1, recently I see it crashes (stack trace attached,
it's on linux). I did some debug but no result. Is it a known issue?

Thanks,
Yong Chen


static int
netsnmp_tcp_send(netsnmp_transport *t, void *buf, int size,
                 void **opaque, int *olength)
{
    int rc = -1;
 

    if (t != NULL && t->sock >= 0) {
        while (rc < 0) {
            rc = send(t->sock, buf, size, 0);    <------
snmpTCPDomain.c:159, crashes here
            if (rc < 0 && errno != EINTR) {
                break;
            }
        }
    }
    return rc;
}


Stack trace:

#0  0x2acf95c8 in __pthread_alt_timedlock () from /lib/libpthread.so.0
#1  0xffffffff in ?? ()
#2  0x2ab22789 in netsnmp_tcp_send (t=0x85a77ec, buf=0x819741d,
size=431, opaque=0x84f31b0, olength=0x84f31b4)
    at .../src/snmp/net-snmp-5.1/snmplib/snmpTCPDomain.c:159
#3  0x2ab110f2 in _sess_async_send (sessp=0x2ab50cbc, pdu=0x84f317c,
callback=0xfffffe00, cb_data=0xfffffe00)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:6401
#4  0x2ab11f7a in snmp_sess_async_send (sessp=0x85a0684, pdu=0x84f317c,
callback=0, cb_data=0x0)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:6748
#5  0x2ab10f2e in snmp_async_send (session=0x84a5cc4, pdu=0x84f317c,
callback=0, cb_data=0x0)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:6219
#6  0x2ab10ec2 in snmp_send (session=0x84a5cc4, pdu=0x84f317c)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:6205
#7  0x2b0da65a in netsnmp_wrap_up_request (asp=0x84d588c,
status=135856628)
    at .../src/snmp/net-snmp-5.1/agent/snmp_agent.c:1941
#8  0x2b0dd280 in netsnmp_handle_request (asp=0x84d588c, status=0)
    at .../src/snmp/net-snmp-5.1/agent/snmp_agent.c:3632
#9  0x2b0dae11 in handle_snmp_packet (op=1, session=0x84a5cc4,
reqid=-512, pdu=0x85d2544, magic=0x0)
    at .../src/snmp/net-snmp-5.1/agent/snmp_agent.c:2180
#10 0x2ab12746 in _sess_process_packet (sessp=0x85a0684, sp=0x84a5cc4,
isp=0x8314724, transport=0x85a77ec,
    opaque=0x856925c, olength=16, packetptr=0x8652154
"0\202\001\205\002\001\0030\202", length=393)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:7135
#11 0x2ab147b3 in _sess_read (sessp=0x85a0684, fdset=0x8652154)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:8147
#12 0x2ab15490 in snmp_sess_read (sessp=0x85a0684, fdset=0x7fffe7f0)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:8244
#13 0x2ab133ad in snmp_read (fdset=0x7fffe7f0)
    at .../src/snmp/net-snmp-5.1/snmplib/snmp_api.c:7477
#14 0x0808d931 in receive () at
.../src/snmp/net-snmp-5.1/agent/snmpd.c:1378
#15 0x0808cba9 in main (argc=5, argv=0x7ffffbb4)
    at .../src/snmp/net-snmp-5.1/agent/snmpd.c:1177
(gdb) p *t
$22 = {domain = 0x80ccf70, domain_length = 9, local = 0x81a19a4 "",
local_length = 6, remote = 0x0,
  remote_length = 0, sock = 49, flags = 1, data = 0x817710c, data_length
= 16, msgMaxSize = 2147483647,
  f_recv = 0x2ab22520 <netsnmp_tcp_recv>, f_send = 0x2ab22750
<netsnmp_tcp_send>,
  f_close = 0x2ab227b0 <netsnmp_tcp_close>, f_accept = 0x2ab22890
<netsnmp_tcp_accept>,
  f_fmtaddr = 0x8052264 <netsnmp_tcp_fmtaddr>}
(gdb) info args
t = (netsnmp_transport *) 0x85a77ec
buf = (void *) 0x819741d
size = 431
opaque = (void **) 0x84f31b0
olength = (int *) 0x84f31b4


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