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An Erlang port interface to libpcap. | |||
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epcap includes a small example program called sniff. | |||
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## QUICK SETUP | |||
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cd epcap | |||
make | |||
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# Allow your user to epcap with root privs | |||
sudo visudo | |||
youruser ALL = NOPASSWD: /path/to/epcap/priv/epcap | |||
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erl -pa ebin deps/*/ebin | |||
% Start the gen_server | |||
sniff:start_link(). | |||
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% Use your interface, or leave it out and trust in pcap | |||
sniff:start([{interface, "eth0"}]). | |||
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% To change the filter | |||
sniff:start([{filter, "icmp or (tcp and port 80)"},{interface, "eth0"}]). | |||
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% To stop sniffing | |||
sniff:stop(). | |||
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## USAGE | |||
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epcap:start() -> pid() | |||
epcap:start(Args) -> pid() | |||
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Types Args = [Options] | |||
Options = {chroot, string()} | {group, string()} | {interface, string()} | {promiscuous, boolean()} | | |||
{user, string()} | {filter, string()} | {progname, string()} | {file, string()} | |||
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## SCREENSHOT | |||
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=INFO REPORT==== 6-Jan-2010::20:35:18 === | |||
time: "2010-01-06 20:35:18" | |||
caplen: 562 | |||
len: 562 | |||
source_macaddr: "0:16:B6:xx:xx:xx" | |||
source_address: {207,97,227,239} | |||
source_port: 80 | |||
destination_macaddr: "0:15:AF:xx:xx:xx" | |||
destination_address: {192,168,1,2} | |||
destination_port: 56934 | |||
protocol: tcp | |||
protocol_header: [{flags,["ack","psh"]}, | |||
{seq,2564452231}, | |||
{ack,3156269309}, | |||
{win,46}] | |||
payload_bytes: 492 | |||
payload: "HTTP/1.1 301 Moved Permanently..Server: nginx/0.7.61..Date: Thu, 07 Jan 2010 01:35:17 GMT..Content-Type: text/html; charset=utf-8..Connection: close..Status: 301 Moved Permanently..Location: http://github.com/dashboard..X-Runtime: 2ms..Content-Length: 93..Set-Cookie: _github_ses=BAh7BiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNoSGFzaHsABjoKQHVzZWR7AA%3D%3D--884981fc5aa85daf318eeff084d98e2cff92578f; path=/; expires=Wed, 01 Jan 2020 08:00:00 GMT; HttpOnly..Cache-Control: no-cache" | |||
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## TODO | |||
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* return error atoms/tuples instead of using errx | |||
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* DLTs | |||
* DLT_NULL | |||
* DLT_SLIP | |||
* DLT_PPP | |||
* DLT_RAW | |||
* DLT\_PPP\_SERIAL | |||
* DLT\_PPP\_ETHER | |||
* DLT\_IEEE802\_11 | |||
* DLT_LOOP | |||
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## CONTRIBUTORS | |||
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* Olivier Girondel: | |||
* preliminary IPv6 support | |||
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* Harald Welte: | |||
* support reading packets from pcap file | |||
* SCTP support | |||
* datalink types | |||
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* Gregory Haskins: | |||
* application file fix | |||
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