1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
5
6 #ifndef __UM_VECTOR_USER_H
7 #define __UM_VECTOR_USER_H
8
9 #define MAXVARGS 20
10
11 #define TOKEN_IFNAME "ifname"
12
13 #define TRANS_RAW "raw"
14 #define TRANS_RAW_LEN strlen(TRANS_RAW)
15
16 #define TRANS_TAP "tap"
17 #define TRANS_TAP_LEN strlen(TRANS_TAP)
18
19 #define TRANS_GRE "gre"
20 #define TRANS_GRE_LEN strlen(TRANS_GRE)
21
22 #define TRANS_L2TPV3 "l2tpv3"
23 #define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)
24
25 #define TRANS_HYBRID "hybrid"
26 #define TRANS_HYBRID_LEN strlen(TRANS_HYBRID)
27
28 #define TRANS_BESS "bess"
29 #define TRANS_BESS_LEN strlen(TRANS_BESS)
30
31 #define DEFAULT_BPF_LEN 6
32
33 #ifndef IPPROTO_GRE
34 #define IPPROTO_GRE 0x2F
35 #endif
36
37 #define GRE_MODE_CHECKSUM cpu_to_be16(8 << 12) /* checksum */
38 #define GRE_MODE_RESERVED cpu_to_be16(4 << 12) /* unused */
39 #define GRE_MODE_KEY cpu_to_be16(2 << 12) /* KEY present */
40 #define GRE_MODE_SEQUENCE cpu_to_be16(1 << 12) /* sequence */
41
42 #define GRE_IRB cpu_to_be16(0x6558)
43
44 #define L2TPV3_DATA_PACKET 0x30000
45
46 /* IANA-assigned IP protocol ID for L2TPv3 */
47
48 #ifndef IPPROTO_L2TP
49 #define IPPROTO_L2TP 0x73
50 #endif
51
52 struct arglist {
53 int numargs;
54 char *tokens[MAXVARGS];
55 char *values[MAXVARGS];
56 };
57
58 /* Separating read and write FDs allows us to have different
59 * rx and tx method. Example - read tap via raw socket using
60 * recvmmsg, write using legacy tap write calls
61 */
62
63 struct vector_fds {
64 int rx_fd;
65 int tx_fd;
66 void *remote_addr;
67 int remote_addr_size;
68 };
69
70 #define VECTOR_READ 1
71
72 extern struct arglist *uml_parse_vector_ifspec(char *arg);
73
74 extern struct vector_fds *uml_vector_user_open(
75 int unit,
76 struct arglist *parsed
77 );
78
79 extern char *uml_vector_fetch_arg(
80 struct arglist *ifspec,
81 char *token
82 );
83
84 extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
85 extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
86 extern int uml_vector_writev(int fd, void *hdr, int iovcount);
87 extern int uml_vector_sendmmsg(
88 int fd, void *msgvec,
89 unsigned int vlen,
90 unsigned int flags
91 );
92 extern int uml_vector_recvmmsg(
93 int fd,
94 void *msgvec,
95 unsigned int vlen,
96 unsigned int flags
97 );
98 extern void *uml_vector_default_bpf(const void *mac);
99 extern void *uml_vector_user_bpf(char *filename);
100 extern int uml_vector_attach_bpf(int fd, void *bpf);
101 extern int uml_vector_detach_bpf(int fd, void *bpf);
102 extern bool uml_raw_enable_qdisc_bypass(int fd);
103 extern bool uml_raw_enable_vnet_headers(int fd);
104 extern bool uml_tap_enable_vnet_headers(int fd);
105
106
107 #endif
108
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