Common definitions for VMWARE devices

Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Yan Vugenfirer <yan@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 347 insertions, 0 deletions

diff --git a/include/net/eth.h b/include/net/eth.h
new file mode 100644
index 0000000..1d48e06
--- /dev/null
+++ b/include/net/eth.h
@@ -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