/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2014 Tobias Klauser.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <unistd.h>
#include <libnl3/netlink/msg.h>
#include <libgen.h>

#include "pkt_buff.h"
#include "proto.h"
#include "protos.h"

static void nlmsg(struct pkt_buff *pkt)
{
	struct nlmsghdr *hdr = (struct nlmsghdr *) pkt_pull(pkt, sizeof(*hdr));
	char type[32];
	char flags[128];
	char procname[1024];

	if (hdr == NULL)
		return;

	/* Look up the process name if message is not coming from the kernel.
	 *
	 * Note that the port id is not necessarily equal to the PID of the
	 * receiving process (e.g. if the application is multithreaded or using
	 * multiple sockets). In these cases we're not able to find a matching
	 * PID and the information will not be printed.
	 */
	if (hdr->nlmsg_pid != 0) {
		char path[1024];
		int ret;

		snprintf(path, sizeof(path), "/proc/%u/exe", hdr->nlmsg_pid);
		ret = readlink(path, procname, sizeof(procname) - 1);
		if (ret < 0)
			procname[0] = '\0';
	} else
		snprintf(procname, sizeof(procname), "kernel");

	tprintf(" [ NLMSG ");
	tprintf("Len %u, ", hdr->nlmsg_len);
	tprintf("Type 0x%.4x (%s%s%s), ", hdr->nlmsg_type,
		colorize_start(bold),
		nl_nlmsgtype2str(hdr->nlmsg_type, type, sizeof(type)),
		colorize_end());
	tprintf("Flags 0x%.4x (%s%s%s), ", hdr->nlmsg_flags,
		colorize_start(bold),
		nl_nlmsg_flags2str(hdr->nlmsg_flags, flags, sizeof(flags)),
		colorize_end());
	tprintf("Seq-Nr %u, ", hdr->nlmsg_seq);
	tprintf("PID %u", hdr->nlmsg_pid);
	if (procname[0])
		tprintf(" (%s%s%s)", colorize_start(bold), basename(procname),
			colorize_end());
	tprintf(" ]\n");
}

static void nlmsg_less(struct pkt_buff *pkt)
{
	struct nlmsghdr *hdr = (struct nlmsghdr *) pkt_pull(pkt, sizeof(*hdr));
	char type[32];

	if (hdr == NULL)
		return;

	tprintf(" NLMSG %u (%s%s%s)", hdr->nlmsg_type, colorize_start(bold),
		nl_nlmsgtype2str(hdr->nlmsg_type, type, sizeof(type)),
		colorize_end());
}

struct protocol nlmsg_ops = {
	.print_full = nlmsg,
	.print_less = nlmsg_less,
};
ef='/cgit.cgi/linux/net-next.git/diff/include/net?h=nds-private-remove&amp;id=a8cab863a75f2d353588d4c3c37dc37c77b96c83'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/net'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=a8cab863a75f2d353588d4c3c37dc37c77b96c83'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?h=nds-private-remove&amp;id=a8cab863a75f2d353588d4c3c37dc37c77b96c83'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net?h=nds-private-remove&amp;id=a8cab863a75f2d353588d4c3c37dc37c77b96c83'>net</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/net?h=nds-private-remove&amp;id=a8cab863a75f2d353588d4c3c37dc37c77b96c83&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-07 14:11:04 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=85c727b5948344c8d559e2fda8925e9ddd41c29a'>sctp: drop __packed from almost all SCTP structures</a></td><td>Marcelo Ricardo Leitner</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-07 13:07:47 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=51ce8bd4d17a761e1a90a34a1b5c9b762cce7553'>net: pending_confirm is not used anymore</a></td><td>Julian Anastasov</td><td>1</td><td><span class='deletions'>-12</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=63fca65d08632fbec9d9b655f671cf08aa1aeeb8'>net: add confirm_neigh method to dst_ops</a></td><td>Julian Anastasov</td><td>4</td><td><span class='deletions'>-0</span>/<span class='insertions'>+42</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>sctp: add dst_pending_confirm flag</a></td><td>Julian Anastasov</td><td>2</td><td><span class='deletions'>-4</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=4ff0620354f2b39b9fe2a91c22c4de9d1fba0c8e'>net: add dst_pending_confirm flag to skbuff</a></td><td>Julian Anastasov</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+14</span></td></tr>
<tr><td><span title='2017-02-07 13:07:46 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=9b8805a325591cf5b6b9df71200de25a2bd721fd'>sock: add sk_dst_pending_confirm flag</a></td><td>Julian Anastasov</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+12</span></td></tr>
<tr><td><span title='2017-02-07 10:51:45 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=71e0bbde0d88047f66b25721f69a441d46083748'>net: dsa: Add support for platform data</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-07 10:51:45 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=14b89f36eed2993670906a3991bca496a5ebf1a6'>net: dsa: Rename and export dev_to_net_device()</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=04d3a4c6af52a58370795bc9f70dc15f51f8bb84'>net: dsa: introduce bridge notifier</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+10</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=f515f192ab4f45bb695146b82432d63d98775787'>net: dsa: add switch notifier</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+7</span></td></tr>
<tr><td><span title='2017-02-04 19:58:14 -0500'>2017-02-04</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=3b1137fe74829e021f483756a648cbb87c8a1b4a'>net: ipv6: Change notifications for multipath add to RTA_MULTIPATH</a></td><td>David Ahern</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-04 19:58:14 -0500'>2017-02-04</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=0ae8133586ad1c9be894411aaf8b17bb58c8efe5'>net: ipv6: Allow shorthand delete of all nexthops in multipath route</a></td><td>David Ahern</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2017-02-03 16:58:20 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=52e01b84a244473074fc0612c169e2e043d58b01'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next</a></td><td>David S. Miller</td><td>8</td><td><span class='deletions'>-26</span>/<span class='insertions'>+28</span></td></tr>
<tr><td><span title='2017-02-03 16:35:43 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=69ca05ce9dec2cc95070df7f1f10ea6c9c12d237'>sched: cls_flower: expose priority to offloading netdevice</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-03 15:21:21 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>ip_tunnels: new IP_TUNNEL_INFO_BRIDGE flag for ip_tunnel_info mode</a></td><td>Roopa Prabhu</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-03 15:16:46 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=295a6e06d21e1f469c9f38b00125a13b60ad4e7c'>net/sched: act_ife: Change to use ife module</a></td><td>Yotam Gigi</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2017-02-03 15:16:45 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=1ce8460496c05379c66edc178c3c55ca4e953044'>net: Introduce ife encapsulation module</a></td><td>Yotam Gigi</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+51</span></td></tr>
<tr><td><span title='2017-02-03 15:16:45 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=1d5e7c859e81a66674d194c346119d154d31e9dc'>net/sched: act_ife: Unexport ife_tlv_meta_encode</a></td><td>Yotam Gigi</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2017-02-02 16:54:00 -0500'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</a></td><td>David S. Miller</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+5</span></td></tr>
<tr><td><span title='2017-02-02 14:31:58 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=2851940ffee313e0ff12540a8e11a8c54dea9c65'>netfilter: allow logging from non-init namespaces</a></td><td>Michal Kubeček</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2017-02-02 14:31:57 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=90c1aff702d449a1a248c4829d51c0bc677f968e'>ipvs: free ip_vs_dest structs when refcnt=0</a></td><td>David Windsor</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-02 14:31:56 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=a9e419dc7be6997409dca6d1b9daf3cc7046902f'>netfilter: merge ctinfo into nfct pointer storage area</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-5</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-02 14:31:55 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=303223092081963513494b4377fa1ac9e362ed4b'>netfilter: guarantee 8 byte minalign for template addresses</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-02 14:31:54 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=c74454fadd5ea6fc866ffe2c417a0dba56b2bf1c'>netfilter: add and use nf_ct_set helper</a></td><td>Florian Westphal</td><td>2</td><td><span class='deletions'>-2</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2017-02-02 14:31:53 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=cb9c68363efb6d1f950ec55fb06e031ee70db5fc'>skbuff: add and use skb_nfct helper</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-02 14:31:52 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=97a6ad13decc16c5adbf181283932daba7e17faf'>netfilter: reduce direct skb-&gt;nfct usage</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-02 14:31:51 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=11df4b760f11ca7528c62b1c4b870735d1c62116'>netfilter: conntrack: no need to pass ctinfo to error handler</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>