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
 52struct 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
 63struct 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#define VECTOR_WRITE	(1 < 1)
 72#define VECTOR_HEADERS	(1 < 2)
 73
 74extern struct arglist *uml_parse_vector_ifspec(char *arg);
 75
 76extern struct vector_fds *uml_vector_user_open(
 77	int unit,
 78	struct arglist *parsed
 79);
 80
 81extern char *uml_vector_fetch_arg(
 82	struct arglist *ifspec,
 83	char *token
 84);
 85
 86extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
 87extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
 88extern int uml_vector_writev(int fd, void *hdr, int iovcount);
 89extern int uml_vector_sendmmsg(
 90	int fd, void *msgvec,
 91	unsigned int vlen,
 92	unsigned int flags
 93);
 94extern int uml_vector_recvmmsg(
 95	int fd,
 96	void *msgvec,
 97	unsigned int vlen,
 98	unsigned int flags
 99);
100extern void *uml_vector_default_bpf(const void *mac);
101extern void *uml_vector_user_bpf(char *filename);
102extern int uml_vector_attach_bpf(int fd, void *bpf);
103extern int uml_vector_detach_bpf(int fd, void *bpf);
104extern bool uml_raw_enable_qdisc_bypass(int fd);
105extern bool uml_raw_enable_vnet_headers(int fd);
106extern bool uml_tap_enable_vnet_headers(int fd);
107
108
109#endif