2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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.
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.
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.
21 #include <arpa/inet.h>
23 #include <net/ethernet.h>
24 #include <netinet/if_ether.h>
25 #include <netinet/ip.h>
26 #include <netinet/udp.h>
28 #include <linux/if_packet.h>
29 #include <linux/rtnetlink.h>
34 #include <libubox/uloop.h>
35 #include <libubox/list.h>
39 #define DPRINTF(level, ...) if (debug >= level) fprintf(stderr, __VA_ARGS__);
41 #define DPRINTF(...) do {} while(0)
45 #define __packed __attribute__((packed))
48 #define __uc(c) ((unsigned char *)(c))
50 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
51 #define MAC_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3], __uc(_c)[4], __uc(_c)[5]
53 #define IP_FMT "%d.%d.%d.%d"
54 #define IP_BUF(_c) __uc(_c)[0], __uc(_c)[1], __uc(_c)[2], __uc(_c)[3]
56 #define DUMMY_IP ((uint8_t *) "\x01\x01\x01\x01")
58 #define DHCP_FLAG_BROADCAST (1 << 15)
60 struct relayd_interface
{
61 struct list_head list
;
63 struct uloop_fd bcast_fd
;
64 struct sockaddr_ll sll
;
65 struct sockaddr_ll bcast_sll
;
66 char ifname
[IFNAMSIZ
];
67 struct list_head hosts
;
74 struct list_head list
;
75 struct list_head routes
;
76 struct relayd_interface
*rif
;
77 uint8_t lladdr
[ETH_ALEN
];
79 struct uloop_timeout timeout
;
84 struct list_head list
;
90 struct ether_header eth
;
99 extern struct list_head interfaces
;
101 extern int route_table
;
102 extern uint8_t local_addr
[4];
103 extern int local_route_table
;
105 void rtnl_route_set(struct relayd_host
*host
, struct relayd_route
*route
, bool add
);
107 static inline void relayd_add_route(struct relayd_host
*host
, struct relayd_route
*route
)
109 rtnl_route_set(host
, route
, true);
112 static inline void relayd_del_route(struct relayd_host
*host
, struct relayd_route
*route
)
114 rtnl_route_set(host
, route
, false);
117 void relayd_add_interface_routes(struct relayd_interface
*rif
);
118 void relayd_del_interface_routes(struct relayd_interface
*rif
);
120 int relayd_rtnl_init(void);
121 void relayd_rtnl_done(void);
123 struct relayd_host
*relayd_refresh_host(struct relayd_interface
*rif
,
124 const uint8_t *lladdr
,
125 const uint8_t *ipaddr
);
126 void relayd_add_host_route(struct relayd_host
*host
, const uint8_t *ipaddr
, uint8_t mask
);
127 void relayd_add_pending_route(const uint8_t *gateway
, const uint8_t *dest
, uint8_t mask
, int timeout
);
129 void relayd_forward_bcast_packet(struct relayd_interface
*from_rif
, void *packet
, int len
);
130 bool relayd_handle_dhcp_packet(struct relayd_interface
*rif
, void *data
, int len
, bool forward
, bool parse
);