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warning: variable ‘length’ set but not used > [-Wunused-but-set-variable] #62

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gabalino opened this issue Mar 16, 2017 · 3 comments
Closed

warning: variable ‘length’ set but not used > [-Wunused-but-set-variable] #62

gabalino opened this issue Mar 16, 2017 · 3 comments

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@gabalino
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I have a task to save IP_SRC_ADDR, IP_DST_ADDR, postNATSourceIPv4Address and postNATDestinationIPv4Address. These fields are present in tcpdump. In the output of nfdump these NAT addresses are missing. Please help to solve this problem.

nfcapd: Version: 1.6.15
nfcapd -e -z -w -t 60 -l /netflow/test -b 10.0.0.118 -p 9995 -E -T all -B
200000
Process_ipfix: [0] Add template 258

After start of nfcapd errors appear

Process_ipfix: [0] option template length error: size left 20 too small for
5 scopes length and 1 options length

Flow Record:
  Flags        =              0x06 FLOW, Unsampled
  export sysid =                 2
  size         =                68
  first        =                 0 [1970-01-01 03:00:00]
  last         =                 0 [1970-01-01 03:00:00]
  msec_first   =                 0
  msec_last    =                 0
  src addr     =    10.0.176.236
  dst addr     =     54.194.31.135
  src port     =             56428
  dst port     =                80
  fwd status   =                 0
  tcp flags    =              0x00 ......
  proto        =                 6 TCP
  (src)tos     =                 0
  (in)packets  =                 0
  (in)bytes    =                 0
  ip router    =       X.X.X.X
  received at  =     1489584299366 [2017-03-15 16:24:59.366]

tcpdump output

Set 1 [id=2] (Data Template): 258
    FlowSet Id: Data Template (V10 [IPFIX]) (2)
    FlowSet Length: 52
    Template (Id = 258, Count = 11)
        Template Id: 258
        Field Count: 11
        Field (1/11): observationTimeMilliseconds
        Field (2/11): IP_SRC_ADDR
        Field (3/11): IP_DST_ADDR
        Field (4/11): postNATSourceIPv4Address
        Field (5/11): postNATDestinationIPv4Address
        Field (6/11): L4_SRC_PORT
        Field (7/11): L4_DST_PORT
        Field (8/11): postNAPTSourceTransportPort
        Field (9/11): postNAPTDestinationTransportPort
        Field (10/11): PROTOCOL
        Field (11/11): natEvent
Flow 1
    Observation Time Milliseconds: Mar  6, 2017 15:50:01.892000000 RTZ 2
(зима)
    SrcAddr: 10.0.166.44
    DstAddr: 104.157.28.150
    Post NAT Source IPv4 Address: X.X.X.X
    Post NAT Destination IPv4 Address: 104.157.28.150
    SrcPort: 17043
    DstPort: 22675
    Post NAPT Source Transport Port: 17043
    Post NAPT Destination Transport Port: 22675
    Protocol: UDP (17)
    Nat Event: 2

nfdump -r nfcapd.201703151624 -o "fmt:%nsa:%nsp => %nda:%ndp" -c 10

   X-late Src IP XsPort       X-late Dst IP XdPort
         0.0.0.0:     0 =>          0.0.0.0:     0
         0.0.0.0:     0 =>          0.0.0.0:     0

when compile i got this warnings? is it normal?

./configure --enable-nsel --enable-nfprofile && make && make install

scanner.c:1889:17: warning: ‘yyunput’ defined but not used [-Wunused-function]
     static void yyunput (int c, register char * yy_bp )
                 ^
scanner.c:1930:16: warning: ‘input’ defined but not used [-Wunused-function]
     static int input  (void)
                ^
nfcapd.c: In function ‘main’:
nfcapd.c:761:18: warning: variable ‘filter’ set but not used [-Wunused-but-set-variable]
 char *bindhost, *filter, *datadir, pidstr[32], *launch_process;
                  ^
netflow_v9.c: In function ‘Process_v9’:
netflow_v9.c:2028:28: warning: variable ‘option_flowset’ set but not used [-Wunused-but-set-variable]
 option_template_flowset_t *option_flowset;
                            ^
ipfix.c: In function ‘Process_ipfix_templates’:
ipfix.c:884:10: warning: variable ‘id’ set but not used [-Wunused-but-set-variable]
 uint32_t id, count;
          ^
ipfix.c: In function ‘Process_ipfix_template_withdraw’:
ipfix.c:1068:16: warning: variable ‘count’ set but not used [-Wunused-but-set-variable]
   uint32_t id, count;
                ^
ipfix.c: In function ‘Process_ipfix_option_templates’:
ipfix.c:1146:16: warning: variable ‘length’ set but not used [-Wunused-but-set-variable]
   uint16_t id, length;
                ^
ipfix.c:1145:12: warning: variable ‘enterprise_value’ set but not used [-Wunused-but-set-variable]
   uint32_t enterprise_value;
            ^
ipfix.c:1179:16: warning: variable ‘length’ set but not used [-Wunused-but-set-variable]
   uint16_t id, length;
                ^
ipfix.c:1178:12: warning: variable ‘enterprise_value’ set but not used [-Wunused-but-set-variable]
   uint32_t enterprise_value;
            ^
ipfix.c:1101:69: warning: variable ‘found_std_sampling’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
                                                                     ^
ipfix.c:1101:39: warning: variable ‘offset_std_sampler_algorithm’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
                                       ^
ipfix.c:1101:10: warning: variable ‘offset_std_sampler_interval’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
          ^
ipfix.c:1100:75: warning: variable ‘found_sampler’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                                                                           ^
ipfix.c:1100:50: warning: variable ‘offset_sampler_interval’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                                                  ^
ipfix.c:1100:29: warning: variable ‘offset_sampler_mode’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                             ^
ipfix.c:1100:10: warning: variable ‘offset_sampler_id’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
          ^
ipfix.c:1099:54: warning: variable ‘sampler_id_length’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
                                                      ^
ipfix.c:1099:46: warning: variable ‘offset’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
                                              ^
ipfix.c:1099:10: warning: variable ‘id’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
          ^
ipfix.c: In function ‘Process_IPFIX’:
ipfix.c:1623:24: warning: variable ‘ObservationDomain’ set but not used [-Wunused-but-set-variable]
 uint32_t   ExportTime, ObservationDomain, Sequence, flowset_length;
                        ^
ipfix.c:1623:12: warning: variable ‘ExportTime’ set but not used [-Wunused-but-set-variable]
 uint32_t   ExportTime, ObservationDomain, Sequence, flowset_length;
            ^
nfreplay.c: In function ‘FlushBuffer’:
nfreplay.c:148:3: warning: implicit declaration of function ‘__fpurge’ [-Wimplicit-function-declaration]
   FPURGE(stdin);
   ^
netflow_v9.c: In function ‘Process_v9’:
netflow_v9.c:2028:28: warning: variable ‘option_flowset’ set but not used [-Wunused-but-set-variable]
 option_template_flowset_t *option_flowset;
                            ^
ipfix.c: In function ‘Process_ipfix_templates’:
ipfix.c:884:10: warning: variable ‘id’ set but not used [-Wunused-but-set-variable]
 uint32_t id, count;
          ^
ipfix.c: In function ‘Process_ipfix_template_withdraw’:
ipfix.c:1068:16: warning: variable ‘count’ set but not used [-Wunused-but-set-variable]
   uint32_t id, count;
                ^
ipfix.c: In function ‘Process_ipfix_option_templates’:
ipfix.c:1146:16: warning: variable ‘length’ set but not used [-Wunused-but-set-variable]
   uint16_t id, length;
                ^
ipfix.c:1145:12: warning: variable ‘enterprise_value’ set but not used [-Wunused-but-set-variable]
   uint32_t enterprise_value;
            ^
ipfix.c:1179:16: warning: variable ‘length’ set but not used [-Wunused-but-set-variable]
   uint16_t id, length;
                ^
ipfix.c:1178:12: warning: variable ‘enterprise_value’ set but not used [-Wunused-but-set-variable]
   uint32_t enterprise_value;
            ^
ipfix.c:1101:69: warning: variable ‘found_std_sampling’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
                                                                     ^
ipfix.c:1101:39: warning: variable ‘offset_std_sampler_algorithm’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
                                       ^
ipfix.c:1101:10: warning: variable ‘offset_std_sampler_interval’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_std_sampler_interval, offset_std_sampler_algorithm, found_std_sampling;
          ^
ipfix.c:1100:75: warning: variable ‘found_sampler’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                                                                           ^
ipfix.c:1100:50: warning: variable ‘offset_sampler_interval’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                                                  ^
ipfix.c:1100:29: warning: variable ‘offset_sampler_mode’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
                             ^
ipfix.c:1100:10: warning: variable ‘offset_sampler_id’ set but not used [-Wunused-but-set-variable]
 uint16_t offset_sampler_id, offset_sampler_mode, offset_sampler_interval, found_sampler;
          ^
ipfix.c:1099:54: warning: variable ‘sampler_id_length’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
                                                      ^
ipfix.c:1099:46: warning: variable ‘offset’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
                                              ^
ipfix.c:1099:10: warning: variable ‘id’ set but not used [-Wunused-but-set-variable]
 uint16_t id, field_count, scope_field_count, offset, sampler_id_length;
          ^
ipfix.c: In function ‘Process_IPFIX’:
ipfix.c:1623:24: warning: variable ‘ObservationDomain’ set but not used [-Wunused-but-set-variable]
 uint32_t   ExportTime, ObservationDomain, Sequence, flowset_length;
                        ^
ipfix.c:1623:12: warning: variable ‘ExportTime’ set but not used [-Wunused-but-set-variable]
 uint32_t   ExportTime, ObservationDomain, Sequence, flowset_length;
            ^
nfexpire.c: In function ‘main’:
nfexpire.c:215:8: warning: variable ‘maxsize_string’ set but not used [-Wunused-but-set-variable]
 char  *maxsize_string, *lifetime_string, *datadir;
        ^
nfexpire.c:213:10: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]
 int   c, err, maxsize_set, maxlife_set;
          ^
profile.c: In function ‘CloseChannels’:
profile.c:369:10: warning: variable ‘update_ok’ set but not used [-Wunused-but-set-variable]
 int ret, update_ok;
@sdemchuk
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sdemchuk commented May 10, 2017 •
edited
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I have same issue with IPFIX NAT events logging:

  • template in IPFIX flow is present
  • tshark or tcpdump correctly decode IPFIX
  • nfcapd/nfdump missed some fields (postNATSourceIPv4Address, postNAPTSourceTransportPort, observationTimeMilliseconds)

ipfix.pcap.zip - pcap of IPFIX flow
nfcapd.201705101355.zip - result of nfcapd

#/usr/local/bin/nfcapd -w -p 4739 -T all -E -l /home/sork

Add extension: 2 byte input/output interface index
Add extension: 4 byte input/output interface index
Add extension: 2 byte src/dst AS number
Add extension: 4 byte src/dst AS number
Add extension: dst tos, direction, src/dst mask
Add extension: IPv4 next hop
Add extension: IPv6 next hop
Add extension: IPv4 BGP next IP
Add extension: IPv6 BGP next IP
Add extension: src/dst vlan id
Add extension: 4 byte output packets
Add extension: 8 byte output packets
Add extension: 4 byte output bytes
Add extension: 8 byte output bytes
Add extension: 4 byte aggregated flows
Add extension: 8 byte aggregated flows
Add extension: in src/out dst mac address
Add extension: in dst/out src mac address
Add extension: MPLS Labels
Add extension: IPv4 router IP addr
Add extension: IPv6 router IP addr
Add extension: router ID
Add extension: BGP adjacent prev/next AS
Add extension: time packet received
Add extension: NSEL Common block
Add extension: NSEL xlate ports
Add extension: NSEL xlate IPv4 addr
Add extension: NSEL xlate IPv6 addr
Add extension: NSEL ACL ingress/egress acl ID
Add extension: NSEL username
Add extension: NSEL max username
Add extension: nprobe/nfpcapd latency
Add extension: NEL Common block
Add extension: Compat NEL IPv4
Add extension: NAT Port Block Allocation
Bound to IPv4 host/IP: any, Port: 4739
Startup.
Init IPFIX: Max number of IPFIX tags: 62
Process_ipfix: New exporter: SysID: 1, Observation domain 1 from: 172.16.0.32

Process_ipfix: [1] Add template 256
Process_ipfix: [1] Add template 257

Flow Record:
  Flags        =              0x06 FLOW, Unsampled
  export sysid =                 1
  size         =                68
  first        =                 0 [1970-01-01 03:00:00]
  last         =                 0 [1970-01-01 03:00:00]
  msec_first   =                 0
  msec_last    =                 0
  src addr     =        10.10.1.21
  dst addr     =           0.0.0.0
  src port     =             53968
  dst port     =                 0
  fwd status   =                 0
  tcp flags    =              0x00 ......
  proto        =                17 UDP
  (src)tos     =                 0
  (in)packets  =                 0
  (in)bytes    =                 0
  ip router    =       172.16.0.32
  received at  =     1494413621059 [2017-05-10 13:53:41.059]


Flow Record:
  Flags        =              0x06 FLOW, Unsampled
  export sysid =                 1
  size         =                68
  first        =                 0 [1970-01-01 03:00:00]
  last         =                 0 [1970-01-01 03:00:00]
  msec_first   =                 0
  msec_last    =                 0
  src addr     =        10.10.1.21
  dst addr     =           0.0.0.0
  src port     =             63390
  dst port     =                 0
  fwd status   =                 0
  tcp flags    =              0x00 ......
  proto        =                17 UDP
  (src)tos     =                 0
  (in)packets  =                 0
  (in)bytes    =                 0
  ip router    =       172.16.0.32
  received at  =     1494413621059 [2017-05-10 13:53:41.059]


Flow Record:
  Flags        =              0x06 FLOW, Unsampled
  export sysid =                 1
  size         =                68
  first        =                 0 [1970-01-01 03:00:00]
  last         =                 0 [1970-01-01 03:00:00]
  msec_first   =                 0
  msec_last    =                 0
  src addr     =        10.10.1.21
  dst addr     =           0.0.0.0
  src port     =              7070
  dst port     =                 0
  fwd status   =                 0
  tcp flags    =              0x00 ......
  proto        =                17 UDP
  (src)tos     =                 0
  (in)packets  =                 0
  (in)bytes    =                 0
  ip router    =       172.16.0.32
  received at  =     1494413621059 [2017-05-10 13:53:41.059]


Flow Record:
  Flags        =              0x06 FLOW, Unsampled
  export sysid =                 1
  size         =                68
  first        =                 0 [1970-01-01 03:00:00]
  last         =                 0 [1970-01-01 03:00:00]
  msec_first   =                 0
  msec_last    =                 0
  src addr     =        10.10.1.21
  dst addr     =           0.0.0.0
  src port     =             53989
  dst port     =                 0
  fwd status   =                 0
  tcp flags    =              0x00 ......
  proto        =                17 UDP
  (src)tos     =                 0
  (in)packets  =                 0
  (in)bytes    =                 0
  ip router    =       172.16.0.32
  received at  =     1494413621059 [2017-05-10 13:53:41.059]

^CFile Block Header:
  NumBlocks     =           7
  Size          =         336
  id             =           2

Ident: 'none' Flows: 4, Packets: 0, Bytes: 0, Sequence Errors: 0, Bad Packets: 0
Total ignored packets: 0
Terminating nfcapd.

# tshark -r ipfix.pcap -V

Frame 1: 98 bytes on wire (784 bits), 98 bytes captured (784 bits) on interface 0
User Datagram Protocol, Src Port: ipfix (4739), Dst Port: ipfix (4739)
    Source port: ipfix (4739)
    Destination port: ipfix (4739)
    Length: 64
    Checksum: 0x2f55 [validation disabled]
        [Good Checksum: False]
        [Bad Checksum: False]
Cisco NetFlow/IPFIX
    Version: 10
    Length: 56
    Timestamp: May 10, 2017 13:53:29.000000000 EEST
        ExportTime: 1494413609
    FlowSequence: 531
    Observation Domain Id: 1
    Set 1
        FlowSet Id: Data Template (V10 [IPFIX]) (2)
        FlowSet Length: 40
        Template (Id = 256, Count = 8)
            Template Id: 256
            Field Count: 8
            Field (1/8): observationTimeMilliseconds
                0... .... .... .... = Pen provided: No
                .000 0001 0100 0011 = Type: observationTimeMilliseconds (323)
                Length: 8
            Field (2/8): natEvent
                0... .... .... .... = Pen provided: No
                .000 0000 1110 0110 = Type: natEvent (230)
                Length: 1
            Field (3/8): IP_SRC_ADDR
                0... .... .... .... = Pen provided: No
                .000 0000 0000 1000 = Type: IP_SRC_ADDR (8)
                Length: 4
            Field (4/8): postNATSourceIPv4Address
                0... .... .... .... = Pen provided: No
                .000 0000 1110 0001 = Type: postNATSourceIPv4Address (225)
                Length: 4
            Field (5/8): PROTOCOL
                0... .... .... .... = Pen provided: No
                .000 0000 0000 0100 = Type: PROTOCOL (4)
                Length: 1
            Field (6/8): L4_SRC_PORT
                0... .... .... .... = Pen provided: No
                .000 0000 0000 0111 = Type: L4_SRC_PORT (7)
                Length: 2
            Field (7/8): postNAPTSourceTransportPort
                0... .... .... .... = Pen provided: No
                .000 0000 1110 0011 = Type: postNAPTSourceTransportPort (227)
                Length: 2
            Field (8/8): ingressVRFID
                0... .... .... .... = Pen provided: No
                .000 0000 1110 1010 = Type: ingressVRFID (234)
                Length: 4

Frame 2: 78 bytes on wire (624 bits), 78 bytes captured (624 bits) on interface 0
User Datagram Protocol, Src Port: ipfix (4739), Dst Port: ipfix (4739)
    Source port: ipfix (4739)
    Destination port: ipfix (4739)
    Length: 44
    Checksum: 0x3157 [validation disabled]
        [Good Checksum: False]
        [Bad Checksum: False]
Cisco NetFlow/IPFIX
    Version: 10
    Length: 36
    Timestamp: May 10, 2017 13:53:34.000000000 EEST
        ExportTime: 1494413614
    FlowSequence: 531
    Observation Domain Id: 1
    Set 1
        FlowSet Id: Data Template (V10 [IPFIX]) (2)
        FlowSet Length: 20
        Template (Id = 257, Count = 3)
            Template Id: 257
            Field Count: 3
            Field (1/3): observationTimeMilliseconds
                0... .... .... .... = Pen provided: No
                .000 0001 0100 0011 = Type: observationTimeMilliseconds (323)
                Length: 8
            Field (2/3): natEvent
                0... .... .... .... = Pen provided: No
                .000 0000 1110 0110 = Type: natEvent (230)
                Length: 1
            Field (3/3): Unknown(283)
                0... .... .... .... = Pen provided: No
                .000 0001 0001 1011 = Type: Unknown (283)
                Length: 4

Frame 3: 166 bytes on wire (1328 bits), 166 bytes captured (1328 bits) on interface 0
User Datagram Protocol, Src Port: ipfix (4739), Dst Port: ipfix (4739)
    Source port: ipfix (4739)
    Destination port: ipfix (4739)
    Length: 132
    Checksum: 0xd7b1 [validation disabled]
        [Good Checksum: False]
        [Bad Checksum: False]
Cisco NetFlow/IPFIX
    Version: 10
    Length: 124
    Timestamp: May 10, 2017 13:53:40.000000000 EEST
        ExportTime: 1494413620
    FlowSequence: 531
    Observation Domain Id: 1
    Set 1
        FlowSet Id: (Data) (256)
        FlowSet Length: 108
        Flow 1
            Observation Time Milliseconds: May 10, 2017 13:53:41.545000000 EEST
            Nat Event: 5
            SrcAddr: 10.10.1.21 (10.10.1.21)
            Post NAT Source IPv4 Address: 31.134.121.0 (31.134.121.0)
            Protocol: 17
            SrcPort: 53968
            Post NAPT Source Transport Port: 15601
            Ingress VRFID: 0
        Flow 2
            Observation Time Milliseconds: May 10, 2017 13:53:41.545000000 EEST
            Nat Event: 4
            SrcAddr: 10.10.1.21 (10.10.1.21)
            Post NAT Source IPv4 Address: 31.134.121.0 (31.134.121.0)
            Protocol: 17
            SrcPort: 63390
            Post NAPT Source Transport Port: 44837
            Ingress VRFID: 0
        Flow 3
            Observation Time Milliseconds: May 10, 2017 13:53:42.056000000 EEST
            Nat Event: 5
            SrcAddr: 10.10.1.21 (10.10.1.21)
            Post NAT Source IPv4 Address: 31.134.121.0 (31.134.121.0)
            Protocol: 17
            SrcPort: 7070
            Post NAPT Source Transport Port: 49517
            Ingress VRFID: 0
        Flow 4
            Observation Time Milliseconds: May 10, 2017 13:53:42.056000000 EEST
            Nat Event: 4
            SrcAddr: 10.10.1.21 (10.10.1.21)
            Post NAT Source IPv4 Address: 31.134.121.0 (31.134.121.0)
            Protocol: 17
            SrcPort: 53989
            Post NAPT Source Transport Port: 38464
            Ingress VRFID: 0

@bbayles
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bbayles commented May 10, 2017

@sdemchuk, you may want to check out the SiLK tools; I've found them to be more compatible with IPSEC when I had this problem with nfdump.

(apologies in advance; I don't mean to be rude in pointing someone to another project)

@phaag
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phaag commented Nov 5, 2017

@gabalino the message

Process_ipfix: [0] option template length error: size left 20 too small for 5 scopes length and 1 options length

obviously means, that your exporter sends corrupted messages. I would need to have more information about this device and a pcap would help.

Most compile warnings have been fixed.

@sdemchuk
I don't consider your issue the same. As of now, nfdump does not support events sent in IPFIX packets. This might be supported in future. In any case I would need the device you are using.

@phaag phaag closed this as completed Nov 5, 2017
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4 participants
@sdemchuk @bbayles @phaag @gabalino