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/*
Copyright (C) 2008 Free Software Foundation, Inc.
Written by Zheng Da.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
The GNU Hurd is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef UTIL_H
#define UTIL_H
#include <stdio.h>
#include <execinfo.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/ip.h>
#include <mach.h>
#ifdef DEBUG
#define debug(format, ...) do \
{ \
char buf[1024]; \
snprintf (buf, 1024, "multiplexer: %s: %s\n", __func__, format); \
fprintf (stderr , buf, ## __VA_ARGS__); \
fflush (stderr); \
} while (0)
#else
#define debug(format, ...) do {} while (0)
#endif
#define print_backtrace() do \
{ \
size_t size; \
void *array[30]; \
size = backtrace (array, sizeof (array)); \
debug ("the depth of the stack: %d", size); \
backtrace_symbols_fd(array, size, fileno (stderr)); \
} while (0)
#define ETH_ALEN 6 /* Octets in one ethernet addr */
struct ethhdr
{
unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
unsigned char h_source[ETH_ALEN]; /* source ether addr */
unsigned short h_proto; /* packet type ID field */
};
static inline void
print_pack (char *packet, int len)
{
#ifdef DEBUG
#define ETH_P_IP 0x0800
struct ethhdr *ethh = (struct ethhdr *) packet;
struct iphdr *iph = (struct iphdr *)(ethh + 1);
char src_str[INET_ADDRSTRLEN];
char dst_str[INET_ADDRSTRLEN];
if (ntohs (ethh->h_proto) == ETH_P_IP
&& len >= sizeof (struct ethhdr) + sizeof (struct iphdr))
{
debug ("multiplexer: get a IP packet from %s to %s\n",
inet_ntop (AF_INET, &iph->saddr, src_str, INET_ADDRSTRLEN),
inet_ntop (AF_INET, &iph->daddr, dst_str, INET_ADDRSTRLEN));
}
else
{
debug ("multiplexer: get a non-IP packet\n");
}
#endif
}
#endif
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