NC-SI (Network Controller Sideband Interface) enables a BMC to manage a set of NICs on a system. This model takes the simplest approach and reverses the NC-SI packets to pretend a NIC is present and exercise the Linux driver. The NCSI header file <ncsi-pkt.h> comes from mainline Linux and was untabified. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
421 lines
13 KiB
C
421 lines
13 KiB
C
/*
|
|
* QEMU network structures definitions and helper functions
|
|
*
|
|
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
|
|
*
|
|
* Developed by Daynix Computing LTD (http://www.daynix.com)
|
|
*
|
|
* Portions developed by Free Software Foundation, Inc
|
|
* Copyright (C) 1991-1997, 2001, 2003, 2006 Free Software Foundation, Inc.
|
|
* See netinet/ip6.h and netinet/in.h (GNU C Library)
|
|
*
|
|
* Portions developed by Igor Kovalenko
|
|
* Copyright (c) 2006 Igor Kovalenko
|
|
* See hw/rtl8139.c (QEMU)
|
|
*
|
|
* Authors:
|
|
* Dmitry Fleytman <dmitry@daynix.com>
|
|
* Tamir Shomer <tamirs@daynix.com>
|
|
* Yan Vugenfirer <yan@daynix.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef QEMU_ETH_H
|
|
#define QEMU_ETH_H
|
|
|
|
#include "qemu/bswap.h"
|
|
#include "qemu/iov.h"
|
|
|
|
#define ETH_ALEN 6
|
|
#define ETH_HLEN 14
|
|
|
|
struct eth_header {
|
|
uint8_t h_dest[ETH_ALEN]; /* destination eth addr */
|
|
uint8_t h_source[ETH_ALEN]; /* source ether addr */
|
|
uint16_t h_proto; /* packet type ID field */
|
|
};
|
|
|
|
struct vlan_header {
|
|
uint16_t h_tci; /* priority and VLAN ID */
|
|
uint16_t h_proto; /* encapsulated protocol */
|
|
};
|
|
|
|
struct ip_header {
|
|
uint8_t ip_ver_len; /* version and header length */
|
|
uint8_t ip_tos; /* type of service */
|
|
uint16_t ip_len; /* total length */
|
|
uint16_t ip_id; /* identification */
|
|
uint16_t ip_off; /* fragment offset field */
|
|
uint8_t ip_ttl; /* time to live */
|
|
uint8_t ip_p; /* protocol */
|
|
uint16_t ip_sum; /* checksum */
|
|
uint32_t ip_src, ip_dst; /* source and destination address */
|
|
};
|
|
|
|
typedef struct tcp_header {
|
|
uint16_t th_sport; /* source port */
|
|
uint16_t th_dport; /* destination port */
|
|
uint32_t th_seq; /* sequence number */
|
|
uint32_t th_ack; /* acknowledgment number */
|
|
uint16_t th_offset_flags; /* data offset, reserved 6 bits, */
|
|
/* TCP protocol flags */
|
|
uint16_t th_win; /* window */
|
|
uint16_t th_sum; /* checksum */
|
|
uint16_t th_urp; /* urgent pointer */
|
|
} tcp_header;
|
|
|
|
#define TCP_FLAGS_ONLY(flags) ((flags) & 0x3f)
|
|
|
|
#define TCP_HEADER_FLAGS(tcp) \
|
|
TCP_FLAGS_ONLY(be16_to_cpu((tcp)->th_offset_flags))
|
|
|
|
#define TCP_FLAG_ACK 0x10
|
|
|
|
#define TCP_HEADER_DATA_OFFSET(tcp) \
|
|
(((be16_to_cpu((tcp)->th_offset_flags) >> 12) & 0xf) << 2)
|
|
|
|
typedef struct udp_header {
|
|
uint16_t uh_sport; /* source port */
|
|
uint16_t uh_dport; /* destination port */
|
|
uint16_t uh_ulen; /* udp length */
|
|
uint16_t uh_sum; /* udp checksum */
|
|
} udp_header;
|
|
|
|
typedef struct ip_pseudo_header {
|
|
uint32_t ip_src;
|
|
uint32_t ip_dst;
|
|
uint8_t zeros;
|
|
uint8_t ip_proto;
|
|
uint16_t ip_payload;
|
|
} ip_pseudo_header;
|
|
|
|
/* IPv6 address */
|
|
struct in6_address {
|
|
union {
|
|
uint8_t __u6_addr8[16];
|
|
} __in6_u;
|
|
};
|
|
|
|
struct ip6_header {
|
|
union {
|
|
struct ip6_hdrctl {
|
|
uint32_t ip6_un1_flow; /* 4 bits version, 8 bits TC,
|
|
20 bits flow-ID */
|
|
uint16_t ip6_un1_plen; /* payload length */
|
|
uint8_t ip6_un1_nxt; /* next header */
|
|
uint8_t ip6_un1_hlim; /* hop limit */
|
|
} ip6_un1;
|
|
uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits tclass */
|
|
struct ip6_ecn_access {
|
|
uint8_t ip6_un3_vfc; /* 4 bits version, top 4 bits tclass */
|
|
uint8_t ip6_un3_ecn; /* 2 bits ECN, top 6 bits payload length */
|
|
} ip6_un3;
|
|
} ip6_ctlun;
|
|
struct in6_address ip6_src; /* source address */
|
|
struct in6_address ip6_dst; /* destination address */
|
|
};
|
|
|
|
typedef struct ip6_pseudo_header {
|
|
struct in6_address ip6_src;
|
|
struct in6_address ip6_dst;
|
|
uint32_t len;
|
|
uint8_t zero[3];
|
|
uint8_t next_hdr;
|
|
} ip6_pseudo_header;
|
|
|
|
struct ip6_ext_hdr {
|
|
uint8_t ip6r_nxt; /* next header */
|
|
uint8_t ip6r_len; /* length in units of 8 octets */
|
|
};
|
|
|
|
struct ip6_ext_hdr_routing {
|
|
uint8_t nxt;
|
|
uint8_t len;
|
|
uint8_t rtype;
|
|
uint8_t segleft;
|
|
uint8_t rsvd[4];
|
|
};
|
|
|
|
struct ip6_option_hdr {
|
|
#define IP6_OPT_PAD1 (0x00)
|
|
#define IP6_OPT_HOME (0xC9)
|
|
uint8_t type;
|
|
uint8_t len;
|
|
};
|
|
|
|
struct udp_hdr {
|
|
uint16_t uh_sport; /* source port */
|
|
uint16_t uh_dport; /* destination port */
|
|
uint16_t uh_ulen; /* udp length */
|
|
uint16_t uh_sum; /* udp checksum */
|
|
};
|
|
|
|
struct tcp_hdr {
|
|
u_short th_sport; /* source port */
|
|
u_short th_dport; /* destination port */
|
|
uint32_t th_seq; /* sequence number */
|
|
uint32_t th_ack; /* acknowledgment number */
|
|
#ifdef HOST_WORDS_BIGENDIAN
|
|
u_char th_off : 4, /* data offset */
|
|
th_x2:4; /* (unused) */
|
|
#else
|
|
u_char th_x2 : 4, /* (unused) */
|
|
th_off:4; /* data offset */
|
|
#endif
|
|
|
|
#define TH_ELN 0x1 /* explicit loss notification */
|
|
#define TH_ECN 0x2 /* explicit congestion notification */
|
|
#define TH_FS 0x4 /* fast start */
|
|
|
|
u_char th_flags;
|
|
#define TH_FIN 0x01
|
|
#define TH_SYN 0x02
|
|
#define TH_RST 0x04
|
|
#define TH_PUSH 0x08
|
|
#define TH_ACK 0x10
|
|
#define TH_URG 0x20
|
|
u_short th_win; /* window */
|
|
u_short th_sum; /* checksum */
|
|
u_short th_urp; /* urgent pointer */
|
|
};
|
|
|
|
#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
|
|
#define ip6_ecn_acc ip6_ctlun.ip6_un3.ip6_un3_ecn
|
|
|
|
#define PKT_GET_ETH_HDR(p) \
|
|
((struct eth_header *)(p))
|
|
#define PKT_GET_VLAN_HDR(p) \
|
|
((struct vlan_header *) (((uint8_t *)(p)) + sizeof(struct eth_header)))
|
|
#define PKT_GET_DVLAN_HDR(p) \
|
|
(PKT_GET_VLAN_HDR(p) + 1)
|
|
#define PKT_GET_IP_HDR(p) \
|
|
((struct ip_header *)(((uint8_t *)(p)) + eth_get_l2_hdr_length(p)))
|
|
#define IP_HDR_GET_LEN(p) \
|
|
((((struct ip_header *)(p))->ip_ver_len & 0x0F) << 2)
|
|
#define PKT_GET_IP_HDR_LEN(p) \
|
|
(IP_HDR_GET_LEN(PKT_GET_IP_HDR(p)))
|
|
#define PKT_GET_IP6_HDR(p) \
|
|
((struct ip6_header *) (((uint8_t *)(p)) + eth_get_l2_hdr_length(p)))
|
|
#define IP_HEADER_VERSION(ip) \
|
|
(((ip)->ip_ver_len >> 4) & 0xf)
|
|
#define IP4_IS_FRAGMENT(ip) \
|
|
((be16_to_cpu((ip)->ip_off) & (IP_OFFMASK | IP_MF)) != 0)
|
|
|
|
#define ETH_P_IP (0x0800) /* Internet Protocol packet */
|
|
#define ETH_P_ARP (0x0806) /* Address Resolution packet */
|
|
#define ETH_P_IPV6 (0x86dd)
|
|
#define ETH_P_VLAN (0x8100)
|
|
#define ETH_P_DVLAN (0x88a8)
|
|
#define ETH_P_NCSI (0x88f8)
|
|
#define ETH_P_UNKNOWN (0xffff)
|
|
#define VLAN_VID_MASK 0x0fff
|
|
#define IP_HEADER_VERSION_4 (4)
|
|
#define IP_HEADER_VERSION_6 (6)
|
|
#define IP_PROTO_TCP (6)
|
|
#define IP_PROTO_UDP (17)
|
|
#define IPTOS_ECN_MASK 0x03
|
|
#define IPTOS_ECN(x) ((x) & IPTOS_ECN_MASK)
|
|
#define IPTOS_ECN_CE 0x03
|
|
#define IP6_ECN_MASK 0xC0
|
|
#define IP6_ECN(x) ((x) & IP6_ECN_MASK)
|
|
#define IP6_ECN_CE 0xC0
|
|
#define IP4_DONT_FRAGMENT_FLAG (1 << 14)
|
|
|
|
#define IS_SPECIAL_VLAN_ID(x) \
|
|
(((x) == 0) || ((x) == 0xFFF))
|
|
|
|
#define ETH_MAX_L2_HDR_LEN \
|
|
(sizeof(struct eth_header) + 2 * sizeof(struct vlan_header))
|
|
|
|
#define ETH_MAX_IP4_HDR_LEN (60)
|
|
#define ETH_MAX_IP_DGRAM_LEN (0xFFFF)
|
|
|
|
#define IP_FRAG_UNIT_SIZE (8)
|
|
#define IP_FRAG_ALIGN_SIZE(x) ((x) & ~0x7)
|
|
#define IP_RF 0x8000 /* reserved fragment flag */
|
|
#define IP_DF 0x4000 /* don't fragment flag */
|
|
#define IP_MF 0x2000 /* more fragments flag */
|
|
#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
|
|
|
|
#define IP6_EXT_GRANULARITY (8) /* Size granularity for
|
|
IPv6 extension headers */
|
|
|
|
/* IP6 extension header types */
|
|
#define IP6_HOP_BY_HOP (0)
|
|
#define IP6_ROUTING (43)
|
|
#define IP6_FRAGMENT (44)
|
|
#define IP6_ESP (50)
|
|
#define IP6_AUTHENTICATION (51)
|
|
#define IP6_NONE (59)
|
|
#define IP6_DESTINATON (60)
|
|
#define IP6_MOBILITY (135)
|
|
|
|
static inline int is_multicast_ether_addr(const uint8_t *addr)
|
|
{
|
|
return 0x01 & addr[0];
|
|
}
|
|
|
|
static inline int is_broadcast_ether_addr(const uint8_t *addr)
|
|
{
|
|
return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
|
|
}
|
|
|
|
static inline int is_unicast_ether_addr(const uint8_t *addr)
|
|
{
|
|
return !is_multicast_ether_addr(addr);
|
|
}
|
|
|
|
typedef enum {
|
|
ETH_PKT_UCAST = 0xAABBCC00,
|
|
ETH_PKT_BCAST,
|
|
ETH_PKT_MCAST
|
|
} eth_pkt_types_e;
|
|
|
|
static inline eth_pkt_types_e
|
|
get_eth_packet_type(const struct eth_header *ehdr)
|
|
{
|
|
if (is_broadcast_ether_addr(ehdr->h_dest)) {
|
|
return ETH_PKT_BCAST;
|
|
} else if (is_multicast_ether_addr(ehdr->h_dest)) {
|
|
return ETH_PKT_MCAST;
|
|
} else { /* unicast */
|
|
return ETH_PKT_UCAST;
|
|
}
|
|
}
|
|
|
|
static inline uint32_t
|
|
eth_get_l2_hdr_length(const void *p)
|
|
{
|
|
uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto);
|
|
struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p);
|
|
switch (proto) {
|
|
case ETH_P_VLAN:
|
|
return sizeof(struct eth_header) + sizeof(struct vlan_header);
|
|
case ETH_P_DVLAN:
|
|
if (be16_to_cpu(hvlan->h_proto) == ETH_P_VLAN) {
|
|
return sizeof(struct eth_header) + 2 * sizeof(struct vlan_header);
|
|
} else {
|
|
return sizeof(struct eth_header) + sizeof(struct vlan_header);
|
|
}
|
|
default:
|
|
return sizeof(struct eth_header);
|
|
}
|
|
}
|
|
|
|
static inline uint32_t
|
|
eth_get_l2_hdr_length_iov(const struct iovec *iov, int iovcnt)
|
|
{
|
|
uint8_t p[sizeof(struct eth_header) + sizeof(struct vlan_header)];
|
|
size_t copied = iov_to_buf(iov, iovcnt, 0, p, ARRAY_SIZE(p));
|
|
|
|
if (copied < ARRAY_SIZE(p)) {
|
|
return copied;
|
|
}
|
|
|
|
return eth_get_l2_hdr_length(p);
|
|
}
|
|
|
|
static inline uint16_t
|
|
eth_get_pkt_tci(const void *p)
|
|
{
|
|
uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto);
|
|
struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p);
|
|
switch (proto) {
|
|
case ETH_P_VLAN:
|
|
case ETH_P_DVLAN:
|
|
return be16_to_cpu(hvlan->h_tci);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
size_t
|
|
eth_strip_vlan(const struct iovec *iov, int iovcnt, size_t iovoff,
|
|
uint8_t *new_ehdr_buf,
|
|
uint16_t *payload_offset, uint16_t *tci);
|
|
|
|
size_t
|
|
eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff,
|
|
uint16_t vet, uint8_t *new_ehdr_buf,
|
|
uint16_t *payload_offset, uint16_t *tci);
|
|
|
|
uint16_t
|
|
eth_get_l3_proto(const struct iovec *l2hdr_iov, int iovcnt, size_t l2hdr_len);
|
|
|
|
void eth_setup_vlan_headers_ex(struct eth_header *ehdr, uint16_t vlan_tag,
|
|
uint16_t vlan_ethtype, bool *is_new);
|
|
|
|
static inline void
|
|
eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
|
|
bool *is_new)
|
|
{
|
|
eth_setup_vlan_headers_ex(ehdr, vlan_tag, ETH_P_VLAN, is_new);
|
|
}
|
|
|
|
|
|
uint8_t eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto);
|
|
|
|
typedef struct eth_ip6_hdr_info_st {
|
|
uint8_t l4proto;
|
|
size_t full_hdr_len;
|
|
struct ip6_header ip6_hdr;
|
|
bool has_ext_hdrs;
|
|
bool rss_ex_src_valid;
|
|
struct in6_address rss_ex_src;
|
|
bool rss_ex_dst_valid;
|
|
struct in6_address rss_ex_dst;
|
|
bool fragment;
|
|
} eth_ip6_hdr_info;
|
|
|
|
typedef struct eth_ip4_hdr_info_st {
|
|
struct ip_header ip4_hdr;
|
|
bool fragment;
|
|
} eth_ip4_hdr_info;
|
|
|
|
typedef struct eth_l4_hdr_info_st {
|
|
union {
|
|
struct tcp_header tcp;
|
|
struct udp_header udp;
|
|
} hdr;
|
|
|
|
bool has_tcp_data;
|
|
} eth_l4_hdr_info;
|
|
|
|
void eth_get_protocols(const struct iovec *iov, int iovcnt,
|
|
bool *isip4, bool *isip6,
|
|
bool *isudp, bool *istcp,
|
|
size_t *l3hdr_off,
|
|
size_t *l4hdr_off,
|
|
size_t *l5hdr_off,
|
|
eth_ip6_hdr_info *ip6hdr_info,
|
|
eth_ip4_hdr_info *ip4hdr_info,
|
|
eth_l4_hdr_info *l4hdr_info);
|
|
|
|
void eth_setup_ip4_fragmentation(const void *l2hdr, size_t l2hdr_len,
|
|
void *l3hdr, size_t l3hdr_len,
|
|
size_t l3payload_len,
|
|
size_t frag_offset, bool more_frags);
|
|
|
|
void
|
|
eth_fix_ip4_checksum(void *l3hdr, size_t l3hdr_len);
|
|
|
|
uint32_t
|
|
eth_calc_ip4_pseudo_hdr_csum(struct ip_header *iphdr,
|
|
uint16_t csl,
|
|
uint32_t *cso);
|
|
|
|
uint32_t
|
|
eth_calc_ip6_pseudo_hdr_csum(struct ip6_header *iphdr,
|
|
uint16_t csl,
|
|
uint8_t l4_proto,
|
|
uint32_t *cso);
|
|
|
|
bool
|
|
eth_parse_ipv6_hdr(const struct iovec *pkt, int pkt_frags,
|
|
size_t ip6hdr_off, eth_ip6_hdr_info *info);
|
|
|
|
#endif
|