Merge tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel...
[firefly-linux-kernel-4.4.55.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 #include <linux/socket.h>
12 #ifdef __KERNEL__
13 #include <linux/in.h>
14 #include <linux/in6.h>
15 #else
16 #include <netinet/in.h>
17 #endif
18
19 #define IPPROTO_L2TP            115
20
21 /**
22  * struct sockaddr_l2tpip - the sockaddr structure for L2TP-over-IP sockets
23  * @l2tp_family:  address family number AF_L2TPIP.
24  * @l2tp_addr:    protocol specific address information
25  * @l2tp_conn_id: connection id of tunnel
26  */
27 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
28 struct sockaddr_l2tpip {
29         /* The first fields must match struct sockaddr_in */
30         __kernel_sa_family_t l2tp_family; /* AF_INET */
31         __be16          l2tp_unused;    /* INET port number (unused) */
32         struct in_addr  l2tp_addr;      /* Internet address */
33
34         __u32           l2tp_conn_id;   /* Connection ID of tunnel */
35
36         /* Pad to size of `struct sockaddr'. */
37         unsigned char   __pad[sizeof(struct sockaddr) -
38                               sizeof(__kernel_sa_family_t) -
39                               sizeof(__be16) - sizeof(struct in_addr) -
40                               sizeof(__u32)];
41 };
42
43 /**
44  * struct sockaddr_l2tpip6 - the sockaddr structure for L2TP-over-IPv6 sockets
45  * @l2tp_family:  address family number AF_L2TPIP.
46  * @l2tp_addr:    protocol specific address information
47  * @l2tp_conn_id: connection id of tunnel
48  */
49 struct sockaddr_l2tpip6 {
50         /* The first fields must match struct sockaddr_in6 */
51         __kernel_sa_family_t l2tp_family; /* AF_INET6 */
52         __be16          l2tp_unused;    /* INET port number (unused) */
53         __be32          l2tp_flowinfo;  /* IPv6 flow information */
54         struct in6_addr l2tp_addr;      /* IPv6 address */
55         __u32           l2tp_scope_id;  /* scope id (new in RFC2553) */
56         __u32           l2tp_conn_id;   /* Connection ID of tunnel */
57 };
58
59 /*****************************************************************************
60  *  NETLINK_GENERIC netlink family.
61  *****************************************************************************/
62
63 /*
64  * Commands.
65  * Valid TLVs of each command are:-
66  * TUNNEL_CREATE        - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
67  * TUNNEL_DELETE        - CONN_ID
68  * TUNNEL_MODIFY        - CONN_ID, udpcsum
69  * TUNNEL_GETSTATS      - CONN_ID, (stats)
70  * TUNNEL_GET           - CONN_ID, (...)
71  * SESSION_CREATE       - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
72  * SESSION_DELETE       - SESSION_ID
73  * SESSION_MODIFY       - SESSION_ID, data_seq
74  * SESSION_GET          - SESSION_ID, (...)
75  * SESSION_GETSTATS     - SESSION_ID, (stats)
76  *
77  */
78 enum {
79         L2TP_CMD_NOOP,
80         L2TP_CMD_TUNNEL_CREATE,
81         L2TP_CMD_TUNNEL_DELETE,
82         L2TP_CMD_TUNNEL_MODIFY,
83         L2TP_CMD_TUNNEL_GET,
84         L2TP_CMD_SESSION_CREATE,
85         L2TP_CMD_SESSION_DELETE,
86         L2TP_CMD_SESSION_MODIFY,
87         L2TP_CMD_SESSION_GET,
88         __L2TP_CMD_MAX,
89 };
90
91 #define L2TP_CMD_MAX                    (__L2TP_CMD_MAX - 1)
92
93 /*
94  * ATTR types defined for L2TP
95  */
96 enum {
97         L2TP_ATTR_NONE,                 /* no data */
98         L2TP_ATTR_PW_TYPE,              /* u16, enum l2tp_pwtype */
99         L2TP_ATTR_ENCAP_TYPE,           /* u16, enum l2tp_encap_type */
100         L2TP_ATTR_OFFSET,               /* u16 */
101         L2TP_ATTR_DATA_SEQ,             /* u16 */
102         L2TP_ATTR_L2SPEC_TYPE,          /* u8, enum l2tp_l2spec_type */
103         L2TP_ATTR_L2SPEC_LEN,           /* u8, enum l2tp_l2spec_type */
104         L2TP_ATTR_PROTO_VERSION,        /* u8 */
105         L2TP_ATTR_IFNAME,               /* string */
106         L2TP_ATTR_CONN_ID,              /* u32 */
107         L2TP_ATTR_PEER_CONN_ID,         /* u32 */
108         L2TP_ATTR_SESSION_ID,           /* u32 */
109         L2TP_ATTR_PEER_SESSION_ID,      /* u32 */
110         L2TP_ATTR_UDP_CSUM,             /* u8 */
111         L2TP_ATTR_VLAN_ID,              /* u16 */
112         L2TP_ATTR_COOKIE,               /* 0, 4 or 8 bytes */
113         L2TP_ATTR_PEER_COOKIE,          /* 0, 4 or 8 bytes */
114         L2TP_ATTR_DEBUG,                /* u32 */
115         L2TP_ATTR_RECV_SEQ,             /* u8 */
116         L2TP_ATTR_SEND_SEQ,             /* u8 */
117         L2TP_ATTR_LNS_MODE,             /* u8 */
118         L2TP_ATTR_USING_IPSEC,          /* u8 */
119         L2TP_ATTR_RECV_TIMEOUT,         /* msec */
120         L2TP_ATTR_FD,                   /* int */
121         L2TP_ATTR_IP_SADDR,             /* u32 */
122         L2TP_ATTR_IP_DADDR,             /* u32 */
123         L2TP_ATTR_UDP_SPORT,            /* u16 */
124         L2TP_ATTR_UDP_DPORT,            /* u16 */
125         L2TP_ATTR_MTU,                  /* u16 */
126         L2TP_ATTR_MRU,                  /* u16 */
127         L2TP_ATTR_STATS,                /* nested */
128         L2TP_ATTR_IP6_SADDR,            /* struct in6_addr */
129         L2TP_ATTR_IP6_DADDR,            /* struct in6_addr */
130         __L2TP_ATTR_MAX,
131 };
132
133 #define L2TP_ATTR_MAX                   (__L2TP_ATTR_MAX - 1)
134
135 /* Nested in L2TP_ATTR_STATS */
136 enum {
137         L2TP_ATTR_STATS_NONE,           /* no data */
138         L2TP_ATTR_TX_PACKETS,           /* u64 */
139         L2TP_ATTR_TX_BYTES,             /* u64 */
140         L2TP_ATTR_TX_ERRORS,            /* u64 */
141         L2TP_ATTR_RX_PACKETS,           /* u64 */
142         L2TP_ATTR_RX_BYTES,             /* u64 */
143         L2TP_ATTR_RX_SEQ_DISCARDS,      /* u64 */
144         L2TP_ATTR_RX_OOS_PACKETS,       /* u64 */
145         L2TP_ATTR_RX_ERRORS,            /* u64 */
146         __L2TP_ATTR_STATS_MAX,
147 };
148
149 #define L2TP_ATTR_STATS_MAX             (__L2TP_ATTR_STATS_MAX - 1)
150
151 enum l2tp_pwtype {
152         L2TP_PWTYPE_NONE = 0x0000,
153         L2TP_PWTYPE_ETH_VLAN = 0x0004,
154         L2TP_PWTYPE_ETH = 0x0005,
155         L2TP_PWTYPE_PPP = 0x0007,
156         L2TP_PWTYPE_PPP_AC = 0x0008,
157         L2TP_PWTYPE_IP = 0x000b,
158         __L2TP_PWTYPE_MAX
159 };
160
161 enum l2tp_l2spec_type {
162         L2TP_L2SPECTYPE_NONE,
163         L2TP_L2SPECTYPE_DEFAULT,
164 };
165
166 enum l2tp_encap_type {
167         L2TP_ENCAPTYPE_UDP,
168         L2TP_ENCAPTYPE_IP,
169 };
170
171 enum l2tp_seqmode {
172         L2TP_SEQ_NONE = 0,
173         L2TP_SEQ_IP = 1,
174         L2TP_SEQ_ALL = 2,
175 };
176
177 /*
178  * NETLINK_GENERIC related info
179  */
180 #define L2TP_GENL_NAME          "l2tp"
181 #define L2TP_GENL_VERSION       0x1
182
183 #endif