This tool handles packets in pcapfile with JavaScript.
go get github.com/google/gopacket
go get github.com/bunji2/pcapscript
go build github.com/bunji2/pcapscript
C:\work>pcapscript.exe
Usage: pcapscript.exe script.js file.pcap [outdir]
Following script displays SrcIP+SrcPort, DstIP+DstPort, TCP flags, and payload of each TCP segment.
// sample.jsfunctionTCP(n,ts,tcp,ip,eth){varflags=[];if(tcp.SYN){flags.push("SYN");}if(tcp.ACK){flags.push("ACK");}if(tcp.PSH){flags.push("PSH");}if(tcp.FIN){flags.push("FIN");}console.log("#"+n,ts.Format("2006/01/02 15:04:05.000"),"\n\t",ipaddr(ip.SrcIP)+":"+tcp.SrcPort,"->",ipaddr(ip.DstIP)+":"+tcp.DstPort,flags.join(","));if(tcp.Payload.length>0){console.log(hex(tcp.Payload))}}C:\work> pcapscript.exe sample.js sample.pcap
#0 2004/05/13 19:17:07.311 145.254.160.237:3372 -> 65.208.228.223:80 SYN
#1 2004/05/13 19:17:08.222 65.208.228.223:80 -> 145.254.160.237:3372 SYN,ACK
#2 2004/05/13 19:17:08.222 145.254.160.237:3372 -> 65.208.228.223:80 ACK
#3 2004/05/13 19:17:08.222 145.254.160.237:3372 -> 65.208.228.223:80 ACK,PSH
00000000 47 45 54 20 2f 64 6f 77 6e 6c 6f 61 64 2e 68 74 |GET /download.ht|
00000010 6d 6c 20 48 54 54 50 2f 31 2e 31 0d 0a 48 6f 73 |ml HTTP/1.1..Hos|
00000020 74 3a 20 77 77 77 2e 65 74 68 65 72 65 61 6c 2e |t: www.ethereal.|
00000030 63 6f 6d 0d 0a 55 73 65 72 2d 41 67 65 6e 74 3a |com..User-Agent:|
00000040 20 4d 6f 7a 69 6c 6c 61 2f 35 2e 30 20 28 57 69 | Mozilla/5.0 (Wi|
00000050 6e 64 6f 77 73 3b 20 55 3b 20 57 69 6e 64 6f 77 |ndows; U; Window|
00000060 73 20 4e 54 20 35 2e 31 3b 20 65 6e 2d 55 53 3b |s NT 5.1; en-US;|
00000070 20 72 76 3a 31 2e 36 29 20 47 65 63 6b 6f 2f 32 | rv:1.6) Gecko/2|
00000080 30 30 34 30 31 31 33 0d 0a 41 63 63 65 70 74 3a |0040113..Accept:|
00000090 20 74 65 78 74 2f 78 6d 6c 2c 61 70 70 6c 69 63 | text/xml,applic|
000000a0 61 74 69 6f 6e 2f 78 6d 6c 2c 61 70 70 6c 69 63 |ation/xml,applic|
000000b0 61 74 69 6f 6e 2f 78 68 74 6d 6c 2b 78 6d 6c 2c |ation/xhtml+xml,|
000000c0 74 65 78 74 2f 68 74 6d 6c 3b 71 3d 30 2e 39 2c |text/html;q=0.9,|
000000d0 74 65 78 74 2f 70 6c 61 69 6e 3b 71 3d 30 2e 38 |text/plain;q=0.8|
000000e0 2c 69 6d 61 67 65 2f 70 6e 67 2c 69 6d 61 67 65 |,image/png,image|
000000f0 2f 6a 70 65 67 2c 69 6d 61 67 65 2f 67 69 66 3b |/jpeg,image/gif;|
00000100 71 3d 30 2e 32 2c 2a 2f 2a 3b 71 3d 30 2e 31 0d |q=0.2,*/*;q=0.1.|
00000110 0a 41 63 63 65 70 74 2d 4c 61 6e 67 75 61 67 65 |.Accept-Language|
00000120 3a 20 65 6e 2d 75 73 2c 65 6e 3b 71 3d 30 2e 35 |: en-us,en;q=0.5|
00000130 0d 0a 41 63 63 65 70 74 2d 45 6e 63 6f 64 69 6e |..Accept-Encodin|
00000140 67 3a 20 67 7a 69 70 2c 64 65 66 6c 61 74 65 0d |g: gzip,deflate.|
00000150 0a 41 63 63 65 70 74 2d 43 68 61 72 73 65 74 3a |.Accept-Charset:|
00000160 20 49 53 4f 2d 38 38 35 39 2d 31 2c 75 74 66 2d | ISO-8859-1,utf-|
00000170 38 3b 71 3d 30 2e 37 2c 2a 3b 71 3d 30 2e 37 0d |8;q=0.7,*;q=0.7.|
00000180 0a 4b 65 65 70 2d 41 6c 69 76 65 3a 20 33 30 30 |.Keep-Alive: 300|
00000190 0d 0a 43 6f 6e 6e 65 63 74 69 6f 6e 3a 20 6b 65 |..Connection: ke|
000001a0 65 70 2d 61 6c 69 76 65 0d 0a 52 65 66 65 72 65 |ep-alive..Refere|
000001b0 72 3a 20 68 74 74 70 3a 2f 2f 77 77 77 2e 65 74 |r: http://www.et|
000001c0 68 65 72 65 61 6c 2e 63 6f 6d 2f 64 65 76 65 6c |hereal.com/devel|
000001d0 6f 70 6d 65 6e 74 2e 68 74 6d 6c 0d 0a 0d 0a |opment.html....|
#4 2004/05/13 19:17:08.783 65.208.228.223:80 -> 145.254.160.237:3372 ACK
#5 2004/05/13 19:17:08.993 65.208.228.223:80 -> 145.254.160.237:3372 ACK
00000000 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d |HTTP/1.1 200 OK.|
00000010 0a 44 61 74 65 3a 20 54 68 75 2c 20 31 33 20 4d |.Date: Thu, 13 M|
00000020 61 79 20 32 30 30 34 20 31 30 3a 31 37 3a 31 32 |ay 2004 10:17:12|
00000030 20 47 4d 54 0d 0a 53 65 72 76 65 72 3a 20 41 70 | GMT..Server: Ap|
00000040 61 63 68 65 0d 0a 4c 61 73 74 2d 4d 6f 64 69 66 |ache..Last-Modif|
00000050 69 65 64 3a 20 54 75 65 2c 20 32 30 20 41 70 72 |ied: Tue, 20 Apr|
00000060 20 32 30 30 34 20 31 33 3a 31 37 3a 30 30 20 47 | 2004 13:17:00 G|
00000070 4d 54 0d 0a 45 54 61 67 3a 20 22 39 61 30 31 61 |MT..ETag: "9a01a|
00000080 2d 34 36 39 36 2d 37 65 33 35 34 62 30 30 22 0d |-4696-7e354b00".|
00000090 0a 41 63 63 65 70 74 2d 52 61 6e 67 65 73 3a 20 |.Accept-Ranges: |
000000a0 62 79 74 65 73 0d 0a 43 6f 6e 74 65 6e 74 2d 4c |bytes..Content-L|
000000b0 65 6e 67 74 68 3a 20 31 38 30 37 30 0d 0a 4b 65 |ength: 18070..Ke|
...
Other examples are here.