dfaggioli/qemu
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Common definitions for VMWARE devices

Browse Source 
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Dmitry Fleytman
2013-03-09 11:21:04 +02:00
committed by Stefan Hajnoczi
parent 8402630169
commit 75020a7021
5 changed files with 823 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

143
hw/vmware_utils.h Normal file
View File

@@ -0,0 +1,143 @@
/*
* QEMU VMWARE paravirtual devices - auxiliary code
*
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
*
* Developed by Daynix Computing LTD (http://www.daynix.com)
*
* Authors:
* Dmitry Fleytman <dmitry@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 VMWARE_UTILS_H
#define VMWARE_UTILS_H
#include "qemu/range.h"
#ifndef VMW_SHPRN
#define VMW_SHPRN(fmt, ...) do {} while (0)
#endif
/*
* Shared memory access functions with byte swap support
* Each function contains printout for reverse-engineering needs
*
*/
static inline void
vmw_shmem_read(hwaddr addr, void *buf, int len)
{
VMW_SHPRN("SHMEM r: %" PRIx64 ", len: %d to %p", addr, len, buf);
cpu_physical_memory_read(addr, buf, len);
}
static inline void
vmw_shmem_write(hwaddr addr, void *buf, int len)
{
VMW_SHPRN("SHMEM w: %" PRIx64 ", len: %d to %p", addr, len, buf);
cpu_physical_memory_write(addr, buf, len);
}
static inline void
vmw_shmem_rw(hwaddr addr, void *buf, int len, int is_write)
{
VMW_SHPRN("SHMEM r/w: %" PRIx64 ", len: %d (to %p), is write: %d",
addr, len, buf, is_write);
cpu_physical_memory_rw(addr, buf, len, is_write);
}
static inline void
vmw_shmem_set(hwaddr addr, uint8 val, int len)
{
int i;
VMW_SHPRN("SHMEM set: %" PRIx64 ", len: %d (value 0x%X)", addr, len, val);
for (i = 0; i < len; i++) {
cpu_physical_memory_write(addr + i, &val, 1);
}
}
static inline uint32_t
vmw_shmem_ld8(hwaddr addr)
{
uint8_t res = ldub_phys(addr);
VMW_SHPRN("SHMEM load8: %" PRIx64 " (value 0x%X)", addr, res);
return res;
}
static inline void
vmw_shmem_st8(hwaddr addr, uint8_t value)
{
VMW_SHPRN("SHMEM store8: %" PRIx64 " (value 0x%X)", addr, value);
stb_phys(addr, value);
}
static inline uint32_t
vmw_shmem_ld16(hwaddr addr)
{
uint16_t res = lduw_le_phys(addr);
VMW_SHPRN("SHMEM load16: %" PRIx64 " (value 0x%X)", addr, res);
return res;
}
static inline void
vmw_shmem_st16(hwaddr addr, uint16_t value)
{
VMW_SHPRN("SHMEM store16: %" PRIx64 " (value 0x%X)", addr, value);
stw_le_phys(addr, value);
}
static inline uint32_t
vmw_shmem_ld32(hwaddr addr)
{
uint32_t res = ldl_le_phys(addr);
VMW_SHPRN("SHMEM load32: %" PRIx64 " (value 0x%X)", addr, res);
return res;
}
static inline void
vmw_shmem_st32(hwaddr addr, uint32_t value)
{
VMW_SHPRN("SHMEM store32: %" PRIx64 " (value 0x%X)", addr, value);
stl_le_phys(addr, value);
}
static inline uint64_t
vmw_shmem_ld64(hwaddr addr)
{
uint64_t res = ldq_le_phys(addr);
VMW_SHPRN("SHMEM load64: %" PRIx64 " (value %" PRIx64 ")", addr, res);
return res;
}
static inline void
vmw_shmem_st64(hwaddr addr, uint64_t value)
{
VMW_SHPRN("SHMEM store64: %" PRIx64 " (value %" PRIx64 ")", addr, value);
stq_le_phys(addr, value);
}
/* Macros for simplification of operations on array-style registers */
/*
* Whether <addr> lies inside of array-style register defined by <base>,
* number of elements (<cnt>) and element size (<regsize>)
*
*/
#define VMW_IS_MULTIREG_ADDR(addr, base, cnt, regsize) \
range_covers_byte(base, cnt * regsize, addr)
/*
* Returns index of given register (<addr>) in array-style register defined by
* <base> and element size (<regsize>)
*
*/
#define VMW_MULTIREG_IDX_BY_ADDR(addr, base, regsize) \
(((addr) - (base)) / (regsize))
#endif

115
hw/vmxnet_debug.h Normal file
View File

@@ -0,0 +1,115 @@
/*
* QEMU VMWARE VMXNET* paravirtual NICs - debugging facilities
*
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
*
* Developed by Daynix Computing LTD (http://www.daynix.com)
*
* 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_VMXNET_DEBUG_H
#define _QEMU_VMXNET_DEBUG_H
#define VMXNET_DEVICE_NAME "vmxnet3"
/* #define VMXNET_DEBUG_CB */
#define VMXNET_DEBUG_WARNINGS
#define VMXNET_DEBUG_ERRORS
/* #define VMXNET_DEBUG_INTERRUPTS */
/* #define VMXNET_DEBUG_CONFIG */
/* #define VMXNET_DEBUG_RINGS */
/* #define VMXNET_DEBUG_PACKETS */
/* #define VMXNET_DEBUG_SHMEM_ACCESS */
#ifdef VMXNET_DEBUG_SHMEM_ACCESS
#define VMW_SHPRN(fmt, ...) \
do { \
printf("[%s][SH][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_SHPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_CB
#define VMW_CBPRN(fmt, ...) \
do { \
printf("[%s][CB][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_CBPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_PACKETS
#define VMW_PKPRN(fmt, ...) \
do { \
printf("[%s][PK][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_PKPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_WARNINGS
#define VMW_WRPRN(fmt, ...) \
do { \
printf("[%s][WR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_WRPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_ERRORS
#define VMW_ERPRN(fmt, ...) \
do { \
printf("[%s][ER][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_ERPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_INTERRUPTS
#define VMW_IRPRN(fmt, ...) \
do { \
printf("[%s][IR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_IRPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_CONFIG
#define VMW_CFPRN(fmt, ...) \
do { \
printf("[%s][CF][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_CFPRN(fmt, ...) do {} while (0)
#endif
#ifdef VMXNET_DEBUG_RINGS
#define VMW_RIPRN(fmt, ...) \
do { \
printf("[%s][RI][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
## __VA_ARGS__); \
} while (0)
#else
#define VMW_RIPRN(fmt, ...) do {} while (0)
#endif
#define VMXNET_MF "%02X:%02X:%02X:%02X:%02X:%02X"
#define VMXNET_MA(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#endif /* _QEMU_VMXNET3_DEBUG_H */

347
include/net/eth.h Normal file
View File

@@ -0,0 +1,347 @@
/*
* 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 <sys/types.h>
#include <string.h>
#include "qemu/bswap.h"
#include "qemu/iov.h"
#define ETH_ALEN 6
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;
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_addr {
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_addr ip6_src; /* source address */
struct in6_addr ip6_dst; /* destination address */
};
struct ip6_ext_hdr {
uint8_t ip6r_nxt; /* next header */
uint8_t ip6r_len; /* length in units of 8 octets */
};
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 ETH_P_IP (0x0800)
#define ETH_P_IPV6 (0x86dd)
#define ETH_P_VLAN (0x8100)
#define ETH_P_DVLAN (0x88a8)
#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 (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 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;
}
}
static inline bool
eth_strip_vlan(const void *p, uint8_t *new_ehdr_buf,
uint16_t *payload_offset, uint16_t *tci)
{
uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto);
struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p);
struct eth_header *new_ehdr = (struct eth_header *) new_ehdr_buf;
switch (proto) {
case ETH_P_VLAN:
case ETH_P_DVLAN:
memcpy(new_ehdr->h_source, PKT_GET_ETH_HDR(p)->h_source, ETH_ALEN);
memcpy(new_ehdr->h_dest, PKT_GET_ETH_HDR(p)->h_dest, ETH_ALEN);
new_ehdr->h_proto = hvlan->h_proto;
*tci = be16_to_cpu(hvlan->h_tci);
*payload_offset =
sizeof(struct eth_header) + sizeof(struct vlan_header);
if (be16_to_cpu(new_ehdr->h_proto) == ETH_P_VLAN) {
memcpy(PKT_GET_VLAN_HDR(new_ehdr),
PKT_GET_DVLAN_HDR(p),
sizeof(struct vlan_header));
*payload_offset += sizeof(struct vlan_header);
}
return true;
default:
return false;
}
}
static inline uint16_t
eth_get_l3_proto(const void *l2hdr, size_t l2hdr_len)
{
uint8_t *proto_ptr = (uint8_t *) l2hdr + l2hdr_len - sizeof(uint16_t);
return be16_to_cpup((uint16_t *)proto_ptr);
}
void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
bool *is_new);
uint8_t eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto);
void eth_get_protocols(const uint8_t *headers,
uint32_t hdr_length,
bool *isip4, bool *isip6,
bool *isudp, bool *istcp);
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_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl);
bool
eth_parse_ipv6_hdr(struct iovec *pkt, int pkt_frags,
size_t ip6hdr_off, uint8_t *l4proto,
size_t *full_hdr_len);
#endif

1
net/Makefile.objs
View File

@@ -1,6 +1,7 @@
common-obj-y = net.o queue.o checksum.o util.o hub.o
common-obj-y += socket.o
common-obj-y += dump.o
common-obj-y += eth.o
common-obj-$(CONFIG_POSIX) += tap.o
common-obj-$(CONFIG_LINUX) += tap-linux.o
common-obj-$(CONFIG_WIN32) += tap-win32.o

217
net/eth.c Normal file
View File

@@ -0,0 +1,217 @@
/*
* 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)
*
* 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.
*
*/
#include "net/eth.h"
#include "net/checksum.h"
#include "qemu-common.h"
#include "net/tap.h"
void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
bool *is_new)
{
struct vlan_header *vhdr = PKT_GET_VLAN_HDR(ehdr);
switch (be16_to_cpu(ehdr->h_proto)) {
case ETH_P_VLAN:
case ETH_P_DVLAN:
/* vlan hdr exists */
*is_new = false;
break;
default:
/* No VLAN header, put a new one */
vhdr->h_proto = ehdr->h_proto;
ehdr->h_proto = cpu_to_be16(ETH_P_VLAN);
*is_new = true;
break;
}
vhdr->h_tci = cpu_to_be16(vlan_tag);
}
uint8_t
eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto)
{
uint8_t ecn_state = 0;
if (l3_proto == ETH_P_IP) {
struct ip_header *iphdr = (struct ip_header *) l3_hdr;
if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) {
if (IPTOS_ECN(iphdr->ip_tos) == IPTOS_ECN_CE) {
ecn_state = VIRTIO_NET_HDR_GSO_ECN;
}
if (l4proto == IP_PROTO_TCP) {
return VIRTIO_NET_HDR_GSO_TCPV4 | ecn_state;
} else if (l4proto == IP_PROTO_UDP) {
return VIRTIO_NET_HDR_GSO_UDP | ecn_state;
}
}
} else if (l3_proto == ETH_P_IPV6) {
struct ip6_header *ip6hdr = (struct ip6_header *) l3_hdr;
if (IP6_ECN(ip6hdr->ip6_ecn_acc) == IP6_ECN_CE) {
ecn_state = VIRTIO_NET_HDR_GSO_ECN;
}
if (l4proto == IP_PROTO_TCP) {
return VIRTIO_NET_HDR_GSO_TCPV6 | ecn_state;
}
}
/* Unsupported offload */
assert(false);
return VIRTIO_NET_HDR_GSO_NONE | ecn_state;
}
void eth_get_protocols(const uint8_t *headers,
uint32_t hdr_length,
bool *isip4, bool *isip6,
bool *isudp, bool *istcp)
{
int proto;
size_t l2hdr_len = eth_get_l2_hdr_length(headers);
assert(hdr_length >= eth_get_l2_hdr_length(headers));
*isip4 = *isip6 = *isudp = *istcp = false;
proto = eth_get_l3_proto(headers, l2hdr_len);
if (proto == ETH_P_IP) {
*isip4 = true;
struct ip_header *iphdr;
assert(hdr_length >=
eth_get_l2_hdr_length(headers) + sizeof(struct ip_header));
iphdr = PKT_GET_IP_HDR(headers);
if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) {
if (iphdr->ip_p == IP_PROTO_TCP) {
*istcp = true;
} else if (iphdr->ip_p == IP_PROTO_UDP) {
*isudp = true;
}
}
} else if (proto == ETH_P_IPV6) {
uint8_t l4proto;
size_t full_ip6hdr_len;
struct iovec hdr_vec;
hdr_vec.iov_base = (void *) headers;
hdr_vec.iov_len = hdr_length;
*isip6 = true;
if (eth_parse_ipv6_hdr(&hdr_vec, 1, l2hdr_len,
&l4proto, &full_ip6hdr_len)) {
if (l4proto == IP_PROTO_TCP) {
*istcp = true;
} else if (l4proto == IP_PROTO_UDP) {
*isudp = true;
}
}
}
}
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)
{
if (eth_get_l3_proto(l2hdr, l2hdr_len) == ETH_P_IP) {
uint16_t orig_flags;
struct ip_header *iphdr = (struct ip_header *) l3hdr;
uint16_t frag_off_units = frag_offset / IP_FRAG_UNIT_SIZE;
uint16_t new_ip_off;
assert(frag_offset % IP_FRAG_UNIT_SIZE == 0);
assert((frag_off_units & ~IP_OFFMASK) == 0);
orig_flags = be16_to_cpu(iphdr->ip_off) & ~(IP_OFFMASK|IP_MF);
new_ip_off = frag_off_units | orig_flags | (more_frags ? IP_MF : 0);
iphdr->ip_off = cpu_to_be16(new_ip_off);
iphdr->ip_len = cpu_to_be16(l3payload_len + l3hdr_len);
}
}
void
eth_fix_ip4_checksum(void *l3hdr, size_t l3hdr_len)
{
struct ip_header *iphdr = (struct ip_header *) l3hdr;
iphdr->ip_sum = 0;
iphdr->ip_sum = cpu_to_be16(net_raw_checksum(l3hdr, l3hdr_len));
}
uint32_t
eth_calc_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl)
{
struct ip_pseudo_header ipph;
ipph.ip_src = iphdr->ip_src;
ipph.ip_dst = iphdr->ip_dst;
ipph.ip_payload = cpu_to_be16(csl);
ipph.ip_proto = iphdr->ip_p;
ipph.zeros = 0;
return net_checksum_add(sizeof(ipph), (uint8_t *) &ipph);
}
static bool
eth_is_ip6_extension_header_type(uint8_t hdr_type)
{
switch (hdr_type) {
case IP6_HOP_BY_HOP:
case IP6_ROUTING:
case IP6_FRAGMENT:
case IP6_ESP:
case IP6_AUTHENTICATION:
case IP6_DESTINATON:
case IP6_MOBILITY:
return true;
default:
return false;
}
}
bool eth_parse_ipv6_hdr(struct iovec *pkt, int pkt_frags,
size_t ip6hdr_off, uint8_t *l4proto,
size_t *full_hdr_len)
{
struct ip6_header ip6_hdr;
struct ip6_ext_hdr ext_hdr;
size_t bytes_read;
bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off,
&ip6_hdr, sizeof(ip6_hdr));
if (bytes_read < sizeof(ip6_hdr)) {
return false;
}
*full_hdr_len = sizeof(struct ip6_header);
if (!eth_is_ip6_extension_header_type(ip6_hdr.ip6_nxt)) {
*l4proto = ip6_hdr.ip6_nxt;
return true;
}
do {
bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off + *full_hdr_len,
&ext_hdr, sizeof(ext_hdr));
*full_hdr_len += (ext_hdr.ip6r_len + 1) * IP6_EXT_GRANULARITY;
} while (eth_is_ip6_extension_header_type(ext_hdr.ip6r_nxt));
*l4proto = ext_hdr.ip6r_nxt;
return true;
}