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[linux-2.6.git] / include / linux / l2tp.h
1 /*
2  * L2TP-over-IP socket for L2TPv3.
3  *
4  * Author: James Chapman <jchapman@katalix.com>
5  */
6
7 #ifndef _LINUX_L2TP_H_
8 #define _LINUX_L2TP_H_
9
10 #include <linux/types.h>
11 #ifdef __KERNEL__
12 #include <linux/socket.h>
13 #include <linux/in.h>
14 #else
15 #include <netinet/in.h>
16 #endif
17
18 #define IPPROTO_L2TP            115
19
20 /**
21  * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets
22  * @l2tp_family:  address family number AF_L2TPIP.
23  * @l2tp_addr:    protocol specific address information
24  * @l2tp_conn_id: connection id of tunnel
25  */
26 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
27 struct sockaddr_l2tpip {
28         /* The first fields must match struct sockaddr_in */
29         sa_family_t     l2tp_family;    /* AF_INET */
30         __be16          l2tp_unused;    /* INET port number (unused) */
31         struct in_addr  l2tp_addr;      /* Internet address */
32
33         __u32           l2tp_conn_id;   /* Connection ID of tunnel */
34
35         /* Pad to size of `struct sockaddr'. */
36         unsigned char   __pad[sizeof(struct sockaddr) - sizeof(sa_family_t) -
37                               sizeof(__be16) - sizeof(struct in_addr) -
38                               sizeof(__u32)];
39 };
40
41 /*****************************************************************************
42  *  NETLINK_GENERIC netlink family.
43  *****************************************************************************/
44
45 /*
46  * Commands.
47  * Valid TLVs of each command are:-
48  * TUNNEL_CREATE        - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
49  * TUNNEL_DELETE        - CONN_ID
50  * TUNNEL_MODIFY        - CONN_ID, udpcsum
51  * TUNNEL_GETSTATS      - CONN_ID, (stats)
52  * TUNNEL_GET           - CONN_ID, (...)
53  * SESSION_CREATE       - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
54  * SESSION_DELETE       - SESSION_ID
55  * SESSION_MODIFY       - SESSION_ID, data_seq
56  * SESSION_GET          - SESSION_ID, (...)
57  * SESSION_GETSTATS     - SESSION_ID, (stats)
58  *
59  */
60 enum {
61         L2TP_CMD_NOOP,
62         L2TP_CMD_TUNNEL_CREATE,
63         L2TP_CMD_TUNNEL_DELETE,
64         L2TP_CMD_TUNNEL_MODIFY,
65         L2TP_CMD_TUNNEL_GET,
66         L2TP_CMD_SESSION_CREATE,
67         L2TP_CMD_SESSION_DELETE,
68         L2TP_CMD_SESSION_MODIFY,
69         L2TP_CMD_SESSION_GET,
70         __L2TP_CMD_MAX,
71 };
72
73 #define L2TP_CMD_MAX                    (__L2TP_CMD_MAX - 1)
74
75 /*
76  * ATTR types defined for L2TP
77  */
78 enum {
79         L2TP_ATTR_NONE,                 /* no data */
80         L2TP_ATTR_PW_TYPE,              /* u16, enum l2tp_pwtype */
81         L2TP_ATTR_ENCAP_TYPE,           /* u16, enum l2tp_encap_type */
82         L2TP_ATTR_OFFSET,               /* u16 */
83         L2TP_ATTR_DATA_SEQ,             /* u16 */
84         L2TP_ATTR_L2SPEC_TYPE,          /* u8, enum l2tp_l2spec_type */
85         L2TP_ATTR_L2SPEC_LEN,           /* u8, enum l2tp_l2spec_type */
86         L2TP_ATTR_PROTO_VERSION,        /* u8 */
87         L2TP_ATTR_IFNAME,               /* string */
88         L2TP_ATTR_CONN_ID,              /* u32 */
89         L2TP_ATTR_PEER_CONN_ID,         /* u32 */
90         L2TP_ATTR_SESSION_ID,           /* u32 */
91         L2TP_ATTR_PEER_SESSION_ID,      /* u32 */
92         L2TP_ATTR_UDP_CSUM,             /* u8 */
93         L2TP_ATTR_VLAN_ID,              /* u16 */
94         L2TP_ATTR_COOKIE,               /* 0, 4 or 8 bytes */
95         L2TP_ATTR_PEER_COOKIE,          /* 0, 4 or 8 bytes */
96         L2TP_ATTR_DEBUG,                /* u32 */
97         L2TP_ATTR_RECV_SEQ,             /* u8 */
98         L2TP_ATTR_SEND_SEQ,             /* u8 */
99         L2TP_ATTR_LNS_MODE,             /* u8 */
100         L2TP_ATTR_USING_IPSEC,          /* u8 */
101         L2TP_ATTR_RECV_TIMEOUT,         /* msec */
102         L2TP_ATTR_FD,                   /* int */
103         L2TP_ATTR_IP_SADDR,             /* u32 */
104         L2TP_ATTR_IP_DADDR,             /* u32 */
105         L2TP_ATTR_UDP_SPORT,            /* u16 */
106         L2TP_ATTR_UDP_DPORT,            /* u16 */
107         L2TP_ATTR_MTU,                  /* u16 */
108         L2TP_ATTR_MRU,                  /* u16 */
109         L2TP_ATTR_STATS,                /* nested */
110         __L2TP_ATTR_MAX,
111 };
112
113 #define L2TP_ATTR_MAX                   (__L2TP_ATTR_MAX - 1)
114
115 /* Nested in L2TP_ATTR_STATS */
116 enum {
117         L2TP_ATTR_STATS_NONE,           /* no data */
118         L2TP_ATTR_TX_PACKETS,           /* u64 */
119         L2TP_ATTR_TX_BYTES,             /* u64 */
120         L2TP_ATTR_TX_ERRORS,            /* u64 */
121         L2TP_ATTR_RX_PACKETS,           /* u64 */
122         L2TP_ATTR_RX_BYTES,             /* u64 */
123         L2TP_ATTR_RX_SEQ_DISCARDS,      /* u64 */
124         L2TP_ATTR_RX_OOS_PACKETS,       /* u64 */
125         L2TP_ATTR_RX_ERRORS,            /* u64 */
126         __L2TP_ATTR_STATS_MAX,
127 };
128
129 #define L2TP_ATTR_STATS_MAX             (__L2TP_ATTR_STATS_MAX - 1)
130
131 enum l2tp_pwtype {
132         L2TP_PWTYPE_NONE = 0x0000,
133         L2TP_PWTYPE_ETH_VLAN = 0x0004,
134         L2TP_PWTYPE_ETH = 0x0005,
135         L2TP_PWTYPE_PPP = 0x0007,
136         L2TP_PWTYPE_PPP_AC = 0x0008,
137         L2TP_PWTYPE_IP = 0x000b,
138         __L2TP_PWTYPE_MAX
139 };
140
141 enum l2tp_l2spec_type {
142         L2TP_L2SPECTYPE_NONE,
143         L2TP_L2SPECTYPE_DEFAULT,
144 };
145
146 enum l2tp_encap_type {
147         L2TP_ENCAPTYPE_UDP,
148         L2TP_ENCAPTYPE_IP,
149 };
150
151 enum l2tp_seqmode {
152         L2TP_SEQ_NONE = 0,
153         L2TP_SEQ_IP = 1,
154         L2TP_SEQ_ALL = 2,
155 };
156
157 /*
158  * NETLINK_GENERIC related info
159  */
160 #define L2TP_GENL_NAME          "l2tp"
161 #define L2TP_GENL_VERSION       0x1
162
163 #endif