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[Qemu-devel] [PATCH 5/7 v5] Various utility functions used by VMWARE net
From: |
Dmitry Fleytman |
Subject: |
[Qemu-devel] [PATCH 5/7 v5] Various utility functions used by VMWARE network devices |
Date: |
Sun, 18 Mar 2012 11:27:00 +0200 |
Signed-off-by: Dmitry Fleytman <address@hidden>
Signed-off-by: Yan Vugenfirer <address@hidden>
---
hw/vmxnet_debug.h | 121 ++++++++++++++++++++
hw/vmxnet_utils.c | 165 +++++++++++++++++++++++++++
hw/vmxnet_utils.h | 320 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 606 insertions(+), 0 deletions(-)
create mode 100644 hw/vmxnet_debug.h
create mode 100644 hw/vmxnet_utils.c
create mode 100644 hw/vmxnet_utils.h
diff --git a/hw/vmxnet_debug.h b/hw/vmxnet_debug.h
new file mode 100644
index 0000000..cc3471f
--- /dev/null
+++ b/hw/vmxnet_debug.h
@@ -0,0 +1,121 @@
+/*
+ * 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 <address@hidden>
+ * Tamir Shomer <address@hidden>
+ * Yan Vugenfirer <address@hidden>
+ *
+ * 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
+
+#ifdef VMXNET_VERSION_2
+ #define VMXNET_DEVICE_NAME "vmxnet"
+#elif defined VMXNET_VERSION_3
+ #define VMXNET_DEVICE_NAME "vmxnet3"
+#else
+ #error "VMXNET version is not defined"
+#endif
+
+/* #define DEBUG_VMXNET_CB */
+#define DEBUG_VMXNET_WARNINGS
+#define DEBUG_VMXNET_ERRORS
+/* #define DEBUG_VMXNET_INTERRUPTS */
+/* #define DEBUG_VMXNET_CONFIG */
+/* #define DEBUG_VMXNET_RINGS */
+/* #define DEBUG_VMXNET_PACKETS */
+/* #define DEBUG_VMXNET_SHMEM_ACCESS */
+
+#ifdef DEBUG_VMXNET_SHMEM_ACCESS
+#define DSHPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][SH][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DSHPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_CB
+#define DCBPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][CB][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DCBPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_PACKETS
+#define DPKPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][PK][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DPKPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_WARNINGS
+#define DWRPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][WR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DWRPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_ERRORS
+#define DERPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][ER][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DERPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_INTERRUPTS
+#define DIRPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][IR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DIRPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_CONFIG
+#define DCFPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][CF][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DCFPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#ifdef DEBUG_VMXNET_RINGS
+#define DRIPRINTF(fmt, ...) \
+ do { \
+ printf("[%s][RI][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \
+ ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DRIPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#define MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X"
+#define MAC_ARG(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
+
+#endif /* _QEMU_VMXNET3_DEBUG_H */
diff --git a/hw/vmxnet_utils.c b/hw/vmxnet_utils.c
new file mode 100644
index 0000000..2f21023
--- /dev/null
+++ b/hw/vmxnet_utils.c
@@ -0,0 +1,165 @@
+/*
+ * QEMU VMWARE VMXNET* paravirtual NICs - network auxiliary code
+ *
+ * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Dmitry Fleytman <address@hidden>
+ * Tamir Shomer <address@hidden>
+ * Yan Vugenfirer <address@hidden>
+ *
+ * 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 "hw.h"
+#include "virtio-net.h"
+#include "vmxnet_utils.h"
+#include "net/checksum.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 ecn_state = 0;
+
+ if (ETH_P_IP == l3_proto) {
+ struct ip_header *iphdr = (struct ip_header *) l3_hdr;
+
+ if (IP_HEADER_VERSION_4 == IP_HEADER_VERSION(iphdr)) {
+ if (IPTOS_ECN_CE == IPTOS_ECN(iphdr->ip_tos)) {
+ ecn_state = VIRTIO_NET_HDR_GSO_ECN;
+ }
+ if (IP_PROTO_TCP == iphdr->ip_p) {
+ return VIRTIO_NET_HDR_GSO_TCPV4 | ecn_state;
+ } else if (IP_PROTO_UDP == iphdr->ip_p) {
+ return VIRTIO_NET_HDR_GSO_UDP | ecn_state;
+ }
+ }
+ } else if (ETH_P_IPV6 == l3_proto) {
+ struct ip6_header *ip6hdr = (struct ip6_header *) l3_hdr;
+
+ if (IP6_ECN_CE == IP6_ECN(ip6hdr->ip6_ecn_acc)) {
+ ecn_state = VIRTIO_NET_HDR_GSO_ECN;
+ }
+
+ if (IP_PROTO_TCP == ip6hdr->ip6_nxt) {
+ 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 (ETH_P_IP == proto) {
+ *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_4 == IP_HEADER_VERSION(iphdr)) {
+ if (IP_PROTO_TCP == iphdr->ip_p) {
+ *istcp = true;
+ } else if (IP_PROTO_UDP == iphdr->ip_p) {
+ *isudp = true;
+ }
+ }
+ } else if (ETH_P_IPV6 == proto) {
+ *isip6 = true;
+
+ struct ip6_header *ip6hdr;
+ assert(hdr_length >=
+ eth_get_l2_hdr_length(headers) + sizeof(struct ip6_header));
+ ip6hdr = PKT_GET_IP6_HDR(headers);
+
+ if (IP_PROTO_TCP == ip6hdr->ip6_nxt) {
+ *istcp = true;
+ } else if (IP_PROTO_UDP == ip6hdr->ip6_nxt) {
+ *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_P_IP == eth_get_l3_proto(l2hdr, l2hdr_len)) {
+ 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(0 == frag_offset % IP_FRAG_UNIT_SIZE);
+ assert(0 == (frag_off_units & ~IP_OFFMASK));
+
+ 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));
+}
+
+uint16_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);
+}
diff --git a/hw/vmxnet_utils.h b/hw/vmxnet_utils.h
new file mode 100644
index 0000000..7040ab9
--- /dev/null
+++ b/hw/vmxnet_utils.h
@@ -0,0 +1,320 @@
+/*
+ * QEMU VMWARE VMXNET* paravirtual NICs - network auxiliary code
+ *
+ * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Dmitry Fleytman <address@hidden>
+ * Tamir Shomer <address@hidden>
+ * Yan Vugenfirer <address@hidden>
+ *
+ * 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 _VMXNET_UTILS_H_
+#define _VMXNET_UTILS_H_
+
+#include <sys/types.h>
+#include <bswap.h>
+#include <string.h>
+#include <targphys.h>
+#include <hw/virtio-net.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 dest 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; /* acknowledgement 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 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; /* acknowledgement number */
+#if BYTE_ORDER == LITTLE_ENDIAN
+ u_char th_x2 : 4, /* (unused) */
+ th_off:4; /* data offset */
+#endif
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char th_off : 4, /* data offset */
+ th_x2:4; /* (unused) */
+#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_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) \
+ ((0 == (x)) || (0xFFF == (x)))
+
+#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_IP6_HDR_LEN \
+ (sizeof(struct ip6_header))
+#define ETH_MAX_L3_HDR_LEN \
+ (MAX(ETH_MAX_IP4_HDR_LEN, ETH_MAX_IP6_HDR_LEN))
+#define ETH_MAX_IP_DGRAM_LEN (0xFFFF)
+#define ETH_MAX_IP_PLOAD_LEN \
+ (ETH_MAX_IP_DGRAM_LEN - ETH_MAX_IP4_HDR_LEN - ETH_MAX_L2_HDR_LEN)
+
+#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 */
+
+
+/* Bitfields */
+#define VMXNET_FLAG_IS_SET(field, flag) (((field) & (flag)) == (flag))
+
+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 (ETH_P_VLAN == hvlan->h_proto) {
+ 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_vlan_tag(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_proto);
+ default:
+ return 0;
+ }
+}
+
+static inline bool
+eth_strip_vlan(const void *p, struct eth_header *new_ehdr,
+ uint16_t *payload_offset, uint16_t *vlan_tag)
+{
+ 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:
+ 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;
+ *vlan_tag = be16_to_cpu(hvlan->h_tci);
+ *payload_offset =
+ sizeof(struct eth_header) + 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);
+
+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);
+
+uint16_t
+eth_calc_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl);
+
+#endif
+
--
1.7.7.6
- [Qemu-devel] [PATCH 0/7 v5] VMXNET3 paravirtual NIC device implementation, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 1/7 v5] Adding missing flag VIRTIO_NET_HDR_F_DATA_VALID from Linux kernel source tre Reformatting comments according to checkpatch.pl requirements, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 2/7 v5] Adding utility function net_checksum_add_cont() that allows checksum calculation of scattered data with odd chunk sizes, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 3/7 v5] Adding utility function iov_net_csum_add() for iovec checksum calculation, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 4/7 v5] Header with various utility functions shared by VMWARE SCSI and network devices, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 5/7 v5] Various utility functions used by VMWARE network devices,
Dmitry Fleytman <=
- [Qemu-devel] [PATCH 6/7 v5] Packet abstraction used by VMWARE network devices, Dmitry Fleytman, 2012/03/18
- [Qemu-devel] [PATCH 7/7 v5] VMXNET3 paravirtualized device implementation Interface type "vmxnet3" added., Dmitry Fleytman, 2012/03/18