relayd.h

   1 /*
   2  *   Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License v2 as published by
   6  *   the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program; if not, write to the Free Software
  15  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  16  *
  17  */
  18 #ifndef __RELAYD_H
  19 #define __RELAYD_H
  20
  21 #define DEBUG
  22 #ifdef DEBUG
  23 #define DPRINTF(level, ...) if (debug >= level) fprintf(stderr, __VA_ARGS__);
  24 #else
  25 #define DPRINTF(...) do {} while(0)
  26 #endif
  27
  28 #ifndef __packed
  29 #define __packed __attribute__((packed))
  30 #endif
  31
  32 #define __uc(c) ((unsigned char *)(c))
  33
  34 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
  35 #define MAC_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3], __uc(_c)[4], __uc(_c)[5]
  36
  37 #define IP_FMT  "%d.%d.%d.%d"
  38 #define IP_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3]
  39
  40 #define DUMMY_IP ((uint8_t *) "\x01\x01\x01\x01")
  41
  42 #define DHCP_FLAG_BROADCAST     (1 << 15)
  43
  44 struct relayd_interface {
  45         struct list_head list;
  46         struct uloop_fd fd;
  47         struct uloop_fd bcast_fd;
  48         struct sockaddr_ll sll;
  49         struct sockaddr_ll bcast_sll;
  50         char ifname[IFNAMSIZ];
  51         struct list_head hosts;
  52         uint8_t src_ip[4];
  53         bool managed;
  54 };
  55
  56 struct relayd_host {
  57         struct list_head list;
  58         struct relayd_interface *rif;
  59         uint8_t lladdr[ETH_ALEN];
  60         uint8_t ipaddr[4];
  61         struct uloop_timeout timeout;
  62         int cleanup_pending;
  63 };
  64
  65 struct arp_packet {
  66         struct ether_header eth;
  67         struct ether_arp arp;
  68 } __packed;
  69
  70 struct ip_packet {
  71         struct ether_header eth;
  72         struct iphdr iph;
  73 } __packed;
  74
  75 struct dhcp_header {
  76         uint8_t op, htype, hlen, hops;
  77         uint32_t xit;
  78         uint16_t secs, flags;
  79         struct in_addr ciaddr, yiaddr, siaddr, giaddr;
  80         unsigned char chaddr[16];
  81         unsigned char sname[64];
  82         unsigned char file[128];
  83 } __packed;
  84
  85 struct rtnl_req {
  86         struct nlmsghdr nl;
  87         struct rtmsg rt;
  88 } __packed;
  89
  90 struct list_head interfaces;
  91 extern int debug;
  92
  93 #endif