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2e27d33d22
No big problem as "raw" and "gre" have the same length, but could go wrong if they don't in the future. Signed-off-by: Ignat Korchagin <ignat@cloudflare.com> Signed-off-by: Richard Weinberger <richard@nod.at>
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __UM_VECTOR_USER_H
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#define __UM_VECTOR_USER_H
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#define MAXVARGS 20
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#define TOKEN_IFNAME "ifname"
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#define TRANS_RAW "raw"
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#define TRANS_RAW_LEN strlen(TRANS_RAW)
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#define TRANS_TAP "tap"
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#define TRANS_TAP_LEN strlen(TRANS_TAP)
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#define TRANS_GRE "gre"
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#define TRANS_GRE_LEN strlen(TRANS_GRE)
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#define TRANS_L2TPV3 "l2tpv3"
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#define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)
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#define TRANS_HYBRID "hybrid"
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#define TRANS_HYBRID_LEN strlen(TRANS_HYBRID)
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#define TRANS_BESS "bess"
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#define TRANS_BESS_LEN strlen(TRANS_BESS)
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#define DEFAULT_BPF_LEN 6
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#ifndef IPPROTO_GRE
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#define IPPROTO_GRE 0x2F
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#endif
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#define GRE_MODE_CHECKSUM cpu_to_be16(8 << 12) /* checksum */
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#define GRE_MODE_RESERVED cpu_to_be16(4 << 12) /* unused */
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#define GRE_MODE_KEY cpu_to_be16(2 << 12) /* KEY present */
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#define GRE_MODE_SEQUENCE cpu_to_be16(1 << 12) /* sequence */
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#define GRE_IRB cpu_to_be16(0x6558)
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#define L2TPV3_DATA_PACKET 0x30000
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/* IANA-assigned IP protocol ID for L2TPv3 */
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#ifndef IPPROTO_L2TP
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#define IPPROTO_L2TP 0x73
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#endif
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struct arglist {
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int numargs;
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char *tokens[MAXVARGS];
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char *values[MAXVARGS];
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};
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/* Separating read and write FDs allows us to have different
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* rx and tx method. Example - read tap via raw socket using
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* recvmmsg, write using legacy tap write calls
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*/
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struct vector_fds {
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int rx_fd;
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int tx_fd;
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void *remote_addr;
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int remote_addr_size;
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};
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#define VECTOR_READ 1
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#define VECTOR_WRITE (1 < 1)
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#define VECTOR_HEADERS (1 < 2)
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extern struct arglist *uml_parse_vector_ifspec(char *arg);
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extern struct vector_fds *uml_vector_user_open(
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int unit,
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struct arglist *parsed
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);
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extern char *uml_vector_fetch_arg(
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struct arglist *ifspec,
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char *token
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);
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extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
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extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
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extern int uml_vector_writev(int fd, void *hdr, int iovcount);
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extern int uml_vector_sendmmsg(
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int fd, void *msgvec,
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unsigned int vlen,
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unsigned int flags
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);
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extern int uml_vector_recvmmsg(
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int fd,
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void *msgvec,
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unsigned int vlen,
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unsigned int flags
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);
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extern void *uml_vector_default_bpf(void *mac);
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extern void *uml_vector_user_bpf(char *filename);
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extern int uml_vector_attach_bpf(int fd, void *bpf);
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extern int uml_vector_detach_bpf(int fd, void *bpf);
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extern bool uml_raw_enable_qdisc_bypass(int fd);
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extern bool uml_raw_enable_vnet_headers(int fd);
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extern bool uml_tap_enable_vnet_headers(int fd);
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#endif
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