Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
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
20#define TRANS_GRE "gre"
21#define TRANS_GRE_LEN strlen(TRANS_RAW)
22
23#define TRANS_L2TPV3 "l2tpv3"
24#define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)
25
26#ifndef IPPROTO_GRE
27#define IPPROTO_GRE 0x2F
28#endif
29
30#define GRE_MODE_CHECKSUM cpu_to_be16(8 << 12) /* checksum */
31#define GRE_MODE_RESERVED cpu_to_be16(4 << 12) /* unused */
32#define GRE_MODE_KEY cpu_to_be16(2 << 12) /* KEY present */
33#define GRE_MODE_SEQUENCE cpu_to_be16(1 << 12) /* sequence */
34
35#define GRE_IRB cpu_to_be16(0x6558)
36
37#define L2TPV3_DATA_PACKET 0x30000
38
39/* IANA-assigned IP protocol ID for L2TPv3 */
40
41#ifndef IPPROTO_L2TP
42#define IPPROTO_L2TP 0x73
43#endif
44
45struct arglist {
46 int numargs;
47 char *tokens[MAXVARGS];
48 char *values[MAXVARGS];
49};
50
51/* Separating read and write FDs allows us to have different
52 * rx and tx method. Example - read tap via raw socket using
53 * recvmmsg, write using legacy tap write calls
54 */
55
56struct vector_fds {
57 int rx_fd;
58 int tx_fd;
59 void *remote_addr;
60 int remote_addr_size;
61};
62
63#define VECTOR_READ 1
64#define VECTOR_WRITE (1 < 1)
65#define VECTOR_HEADERS (1 < 2)
66
67extern struct arglist *uml_parse_vector_ifspec(char *arg);
68
69extern struct vector_fds *uml_vector_user_open(
70 int unit,
71 struct arglist *parsed
72);
73
74extern char *uml_vector_fetch_arg(
75 struct arglist *ifspec,
76 char *token
77);
78
79extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
80extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
81extern int uml_vector_writev(int fd, void *hdr, int iovcount);
82extern int uml_vector_sendmmsg(
83 int fd, void *msgvec,
84 unsigned int vlen,
85 unsigned int flags
86);
87extern int uml_vector_recvmmsg(
88 int fd,
89 void *msgvec,
90 unsigned int vlen,
91 unsigned int flags
92);
93extern void *uml_vector_default_bpf(int fd, void *mac);
94extern int uml_vector_attach_bpf(int fd, void *bpf, int bpf_len);
95extern bool uml_raw_enable_qdisc_bypass(int fd);
96extern bool uml_raw_enable_vnet_headers(int fd);
97extern bool uml_tap_enable_vnet_headers(int fd);
98
99
100#endif