/*
 * 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,
};
to/lrw.h?id=6bdded59c8933940ac7e5b416448276ac89d1144'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/crypto/lrw.h'>
<input type='hidden' name='id' value='6bdded59c8933940ac7e5b416448276ac89d1144'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=6bdded59c8933940ac7e5b416448276ac89d1144&amp;showmsg=1'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?id=6bdded59c8933940ac7e5b416448276ac89d1144&amp;showmsg=1'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/crypto?id=6bdded59c8933940ac7e5b416448276ac89d1144&amp;showmsg=1'>crypto</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/crypto/lrw.h?id=6bdded59c8933940ac7e5b416448276ac89d1144&amp;showmsg=1'>lrw.h</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/crypto/lrw.h?id=6bdded59c8933940ac7e5b416448276ac89d1144'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>