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9807019a62
All vector drivers now allow a BPF program to be loaded and associated with the RX socket in the host kernel. 1. The program can be loaded as an extra kernel command line option to any of the vector drivers. 2. The program can also be loaded as "firmware", using the ethtool flash option. It is possible to turn this facility on or off using a command line option. A simplistic wrapper for generating the BPF firmware for the raw socket driver out of a tcpdump/libpcap filter expression can be found at: https://github.com/kot-begemot-uk/uml_vector_utilities/ Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.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_RAW)
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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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