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vr_packet.h
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vr_packet.h
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/*
* vr_packet.h -- packet handling functionality of vrouter
*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#ifndef __VR_PACKET_H__
#define __VR_PACKET_H__
#include "vr_defs.h"
#include "vr_qos.h"
#include "vr_flow.h"
#include "vrouter.h"
/* ethernet header */
#define VR_ETHER_DMAC_OFF 0
#define VR_ETHER_SMAC_OFF 6
#define VR_ETHER_PROTO_OFF 12
#define VR_ETHER_VLAN_PROTO_OFF 16
#define VR_ETHER_PROTO_MAC_OFF 1
#define VR_ETHER_PROTO_MAC_LEN 2
#define VR_IP_PROTO_ICMP 1
#define VR_IP_PROTO_IGMP 2
#define VR_IP_PROTO_TCP 6
#define VR_IP_PROTO_UDP 17
#define VR_IP_PROTO_GRE 47
#define VR_IP_PROTO_ICMP6 58
#define VR_IP_PROTO_SCTP 132
#define VR_GRE_FLAG_CSUM (ntohs(0x8000))
#define VR_GRE_FLAG_KEY (ntohs(0x2000))
#define VR_DHCP_SRC_PORT 68
#define VR_DHCP6_SRC_PORT 546
/* Size of basic GRE header */
#define VR_GRE_BASIC_HDR_LEN 4
/* Size of GRE header with checksum */
#define VR_GRE_CKSUM_HDR_LEN 8
/* Size of GRE header with key */
#define VR_GRE_KEY_HDR_LEN 8
#define VR_DYNAMIC_PORT_START 0
#define VR_DYNAMIC_PORT_END 65535
/*
* Overlay length used for TCP MSS adjust. For UDP outer header, overlay
* len is 20 (IP header) + 8 (UDP) + 4 (MPLS). For GRE, it is 20 (IP header)
* + 8 (GRE header + key) + 4 (MPLS). Instead of allowing for only one
* label, we will allow a maximum of 3 labels, so we end up with 40 bytes
* of overleay headers.
*/
#define VROUTER_OVERLAY_LEN 40
/*
* Over lay length is going to be ethernet header bytes more incase of L2 packet
*/
#define VROUTER_L2_OVERLAY_LEN 62
/* packets originated by DP. For eg: mirrored packets */
#define VP_FLAG_FROM_DP (1 << 0)
#define VP_FLAG_TO_ME (1 << 1)
/* request policy lookup - for components other than interfaces */
#define VP_FLAG_FLOW_GET (1 << 2)
/* packet already went through one round of policy lookup */
#define VP_FLAG_FLOW_SET (1 << 3)
#define VP_FLAG_MULTICAST (1 << 4)
/* Partially checksummed by VM */
#define VP_FLAG_CSUM_PARTIAL (1 << 5)
/* Attempt to do receive offload on inner packet */
#define VP_FLAG_GRO (1 << 6)
/* Attempt to do segmentation on inner packet */
#define VP_FLAG_GSO (1 << 7)
/* Diagnostic packet */
#define VP_FLAG_DIAG (1 << 8)
#define VP_FLAG_GROED (1 << 9)
/*
* possible 256 values of what a packet can be. currently, this value is
* used only as an aid in fragmentation.
*/
#define VP_TYPE_NULL 0
#define VP_TYPE_ARP 1
#define VP_TYPE_IP 2
#define VP_TYPE_IP6 3
#define VP_TYPE_IPOIP 4
#define VP_TYPE_IP6OIP 5
#define VP_TYPE_AGENT 6
#define VP_TYPE_UNKNOWN 7
#define VP_TYPE_MAX VP_TYPE_UNKNOWN
/*
* Values to define how to proceed with handling a packet.
*/
#define PKT_RET_FAST_PATH 1
#define PKT_RET_SLOW_PATH 2
#define PKT_RET_ERROR 3
#define PKT_RET_UNHANDLED 4
/*
* Values to define the MPLS tunnel type
*/
#define PKT_MPLS_TUNNEL_INVALID 0x00
#define PKT_MPLS_TUNNEL_L3 0x01
#define PKT_MPLS_TUNNEL_L2_UCAST 0x02
#define PKT_MPLS_TUNNEL_L2_MCAST 0x03
#define PKT_MPLS_TUNNEL_L2_MCAST_EVPN 0x04
/*
* Values to defaine the srouce of Multicast packet
*/
#define PKT_SRC_TOR_REPL_TREE 0x1
#define PKT_SRC_INGRESS_REPL_TREE 0x2
#define PKT_SRC_EDGE_REPL_TREE 0x4
#define PKT_SRC_ANY_REPL_TREE (PKT_SRC_TOR_REPL_TREE | \
PKT_SRC_SRC_REPL_TREE | PKT_SRC_EDGE_REPL_TREE)
/*
* Values to define the encap type of outgoing packet
*/
#define PKT_ENCAP_MPLS 0x01
#define PKT_ENCAP_VXLAN 0x02
/* packet drop reasons */
#define VP_DROP_DISCARD 0
#define VP_DROP_PULL 1
#define VP_DROP_INVALID_IF 2
#define VP_DROP_ARP_NO_WHERE_TO_GO 3
#define VP_DROP_GARP_FROM_VM 4
#define VP_DROP_INVALID_ARP 5
#define VP_DROP_TRAP_NO_IF 6
#define VP_DROP_NOWHERE_TO_GO 7
#define VP_DROP_FLOW_QUEUE_LIMIT_EXCEEDED 8
#define VP_DROP_FLOW_NO_MEMORY 9
#define VP_DROP_FLOW_INVALID_PROTOCOL 10
#define VP_DROP_FLOW_NAT_NO_RFLOW 11
#define VP_DROP_FLOW_ACTION_DROP 12
#define VP_DROP_FLOW_ACTION_INVALID 13
#define VP_DROP_FLOW_UNUSABLE 14
#define VP_DROP_FLOW_TABLE_FULL 15
#define VP_DROP_INTERFACE_TX_DISCARD 16
#define VP_DROP_INTERFACE_DROP 17
#define VP_DROP_DUPLICATED 18
#define VP_DROP_PUSH 19
#define VP_DROP_TTL_EXCEEDED 20
#define VP_DROP_INVALID_NH 21
#define VP_DROP_INVALID_LABEL 22
#define VP_DROP_INVALID_PROTOCOL 23
#define VP_DROP_INTERFACE_RX_DISCARD 24
#define VP_DROP_INVALID_MCAST_SOURCE 25
#define VP_DROP_HEAD_ALLOC_FAIL 26
#define VP_DROP_HEAD_SPACE_RESERVE_FAIL 27
#define VP_DROP_PCOW_FAIL 28
#define VP_DROP_MCAST_DF_BIT 29
#define VP_DROP_MCAST_CLONE_FAIL 30
#define VP_DROP_NO_MEMORY 31
#define VP_DROP_REWRITE_FAIL 32
#define VP_DROP_MISC 33
#define VP_DROP_INVALID_PACKET 34
#define VP_DROP_CKSUM_ERR 35
/* #define VP_DROP_CLONE_FAIL 36 - UNUSED */
#define VP_DROP_NO_FMD 37
#define VP_DROP_CLONED_ORIGINAL 38
#define VP_DROP_INVALID_VNID 39
#define VP_DROP_FRAGMENTS 40
#define VP_DROP_INVALID_SOURCE 41
#define VP_DROP_ARP_NO_ROUTE 42
#define VP_DROP_L2_NO_ROUTE 43
#define VP_DROP_FRAGMENT_QUEUE_FAIL 44
#define VP_DROP_VLAN_FWD_TX 45
#define VP_DROP_VLAN_FWD_ENQ 46
#define VP_DROP_NEW_FLOWS 47
#define VP_DROP_FLOW_EVICT 48
#define VP_DROP_MAX 49
struct vr_drop_stats {
uint64_t vds_discard;
uint64_t vds_pull;
uint64_t vds_invalid_if;
uint64_t vds_arp_no_where_to_go;
uint64_t vds_garp_from_vm;
uint64_t vds_invalid_arp;
uint64_t vds_trap_no_if;
uint64_t vds_nowhere_to_go;
uint64_t vds_flow_queue_limit_exceeded;
uint64_t vds_flow_no_memory;
uint64_t vds_flow_invalid_protocol;
uint64_t vds_flow_nat_no_rflow;
uint64_t vds_flow_action_drop;
uint64_t vds_flow_action_invalid;
uint64_t vds_flow_unusable;
uint64_t vds_flow_table_full;
uint64_t vds_interface_tx_discard;
uint64_t vds_interface_drop;
uint64_t vds_duplicated;
uint64_t vds_push;
uint64_t vds_ttl_exceeded;
uint64_t vds_invalid_nh;
uint64_t vds_invalid_label;
uint64_t vds_invalid_protocol;
uint64_t vds_interface_rx_discard;
uint64_t vds_invalid_mcast_source;
uint64_t vds_head_alloc_fail;
uint64_t vds_head_space_reserve_fail;
uint64_t vds_pcow_fail;
uint64_t vds_mcast_df_bit;
uint64_t vds_mcast_clone_fail;
uint64_t vds_no_memory;
uint64_t vds_rewrite_fail;
uint64_t vds_misc;
uint64_t vds_invalid_packet;
uint64_t vds_cksum_err;
uint64_t vds_clone_fail;
uint64_t vds_no_fmd;
uint64_t vds_cloned_original;
uint64_t vds_invalid_vnid;
uint64_t vds_frag_err;
uint64_t vds_invalid_source;
uint64_t vds_arp_no_route;
uint64_t vds_l2_no_route;
uint64_t vds_fragment_queue_fail;
uint64_t vds_vlan_fwd_tx;
uint64_t vds_vlan_fwd_enq;
uint64_t vds_drop_new_flow;
uint64_t vds_flow_evict;
};
/*
* NOTE: Please do not add any more fields without ensuring
* that the size is <= 48 bytes in 64 bit systems.
*/
struct vr_packet {
unsigned char *vp_head;
struct vr_interface *vp_if;
struct vr_nexthop *vp_nh;
unsigned short vp_data;
unsigned short vp_tail;
unsigned short vp_len;
unsigned short vp_end;
unsigned short vp_network_h;
unsigned short vp_flags;
unsigned short vp_inner_network_h;
unsigned char vp_cpu;
unsigned char vp_type;
unsigned char vp_ttl;
unsigned char vp_queue;
unsigned char vp_priority:4,
vp_notused:4;
};
#define VP_QUEUE_INVALID 0xFF
#define VP_PRIORITY_INVALID 0xF
extern void pkt_reset(struct vr_packet *);
extern struct vr_packet *pkt_copy(struct vr_packet *, unsigned short,
unsigned short);
extern struct vr_packet *pkt_cow(struct vr_packet *, unsigned short);
extern int vr_myip(struct vr_interface *, unsigned int);
typedef enum {
L4_TYPE_UNKNOWN,
L4_TYPE_DHCP_REQUEST,
L4_TYPE_ROUTER_SOLICITATION,
L4_TYPE_NEIGHBOUR_SOLICITATION,
} l4_pkt_type_t;
struct vr_eth {
unsigned char eth_dmac[VR_ETHER_ALEN];
unsigned char eth_smac[VR_ETHER_ALEN];
unsigned short eth_proto;
} __attribute__((packed));
#define VLAN_ID_INVALID 0xFFFF
#define VLAN_ID_MAX 0xFFFF
#define VR_VLAN_PRIORITY_SHIFT 13
struct vr_vlan_hdr {
unsigned short vlan_tag;
unsigned short vlan_proto;
} __attribute__((packed));
#define VR_ARP_HW_LEN 6
#define VR_ARP_OP_REQUEST 1
#define VR_ARP_OP_REPLY 2
#define VR_ETH_PROTO_ARP 0x806
#define VR_ETH_PROTO_IP 0x800
#define VR_ETH_PROTO_IP6 0x86DD
#define VR_ETH_PROTO_VLAN 0x8100
#define VR_DIAG_CSUM 0xffff
static inline int8_t
vr_vlan_get_tos(uint8_t *eth_data)
{
struct vr_eth *eth = (struct vr_eth *)eth_data;
struct vr_vlan_hdr *vlan;
if (ntohs(eth->eth_proto) != VR_ETH_PROTO_VLAN)
return -1;
vlan = (struct vr_vlan_hdr *)(eth + 1);
return (ntohs(vlan->vlan_tag) >> VR_VLAN_PRIORITY_SHIFT);
}
#ifdef arp_op
#undef arp_op
#endif
#define VR_ARP_HW_TYPE_ETHER 1
struct vr_arp {
unsigned short arp_hw;
unsigned short arp_proto;
unsigned char arp_hwlen;
unsigned char arp_protolen;
unsigned short arp_op;
unsigned char arp_sha[VR_ARP_HW_LEN];
unsigned int arp_spa;
unsigned char arp_dha[VR_ARP_HW_LEN];
unsigned int arp_dpa;
} __attribute__((packed));
static inline bool
vr_grat_arp(struct vr_arp *sarp)
{
/*
* Treat below two as Gratuitous ARP
* Null source IP - ARP Probe
* Source IP same as dest IP - ARP Announcement
*/
if ((!sarp->arp_spa) || (sarp->arp_spa == sarp->arp_dpa))
return true;
return false;
}
#define VR_IP_DF (0x1 << 14)
#define VR_IP_MF (0x1 << 13)
#define VR_IP_FRAG_OFFSET_MASK (VR_IP_MF - 1)
#define VR_IP_DSCP(val) ((val) << 2)
#define VR_IP_ADDRESS_LEN 4
struct vr_ip {
#if defined(__KERNEL__) && defined(__linux__)
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned char ip_hl:4,
ip_version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned char ip_version:4,
ip_hl:4;
#endif
#elif defined(__KERNEL__) && defined(__FreeBSD__)
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned char ip_hl:4,
ip_version:4;
#elif BYTE_ORDER == BIG_ENDIAN
unsigned char ip_version:4,
ip_hl:4;
#endif
#else
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
unsigned char ip_hl:4,
ip_version:4;
#elif (__BYTE_ORDER == __BIG_ENDIAN)
unsigned char ip_version:4,
ip_hl:4;
#endif
#endif
unsigned char ip_tos;
unsigned short ip_len;
unsigned short ip_id;
unsigned short ip_frag_off;
unsigned char ip_ttl;
unsigned char ip_proto;
unsigned short ip_csum;
unsigned int ip_saddr;
unsigned int ip_daddr;
} __attribute__((packed));
static inline void
vr_incremental_diff(unsigned int oldval, unsigned int newval,
unsigned int *diff)
{
unsigned int tmp;
tmp = ~oldval + newval;
if (tmp < newval)
tmp += 1;
*diff += tmp;
if (*diff < tmp)
*diff += 1;
return;
}
static inline void
vr_ip_incremental_csum(struct vr_ip *ip, unsigned int diff)
{
unsigned int csum;
diff = (diff >> 16) + (diff & 0xffff);
if (diff >> 16) {
diff &= 0xffff;
diff += 1;
}
csum = ~(ip->ip_csum) & 0xffff;
csum += diff;
csum = (csum >> 16) + (csum & 0xffff);
if (csum >> 16)
csum = (csum & 0xffff) + 1;
ip->ip_csum = (~csum & 0xffff);
return;
}
static inline uint8_t
vr_inet_get_tos(struct vr_ip *iph)
{
return (iph->ip_tos & 0xFC) >> 2;
}
static inline void
vr_inet_set_tos(struct vr_ip *iph, uint8_t tos)
{
unsigned int diff = 0;
if (iph->ip_tos == tos)
return;
vr_incremental_diff(iph->ip_tos << 8, tos << 8, &diff);
iph->ip_tos = tos;
vr_ip_incremental_csum(iph, diff);
return;
}
#define SOURCE_LINK_LAYER_ADDRESS_OPTION 1
#define TARGET_LINK_LAYER_ADDRESS_OPTION 2
struct vr_neighbor_option {
uint8_t vno_type;
uint8_t vno_length;
uint8_t vno_value[0];
} __attribute__((packed));
struct vr_ip6_pseudo {
unsigned char ip6_src[VR_IP6_ADDRESS_LEN];
unsigned char ip6_dst[VR_IP6_ADDRESS_LEN];
unsigned short ip6_l4_length;
unsigned short ip6_zero;
unsigned int ip6_zero_nh;
} __attribute__((packed));
struct vr_ip6 {
#ifdef __KERNEL__
#if defined(__LITTLE_ENDIAN_BITFIELD)
uint8_t ip6_priority_h:4,
ip6_version:4;
uint8_t ip6_flow_h:4,
ip6_priority_l:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
uint8_t ip6_version:4,
ip6_priority_h:4;
uint8_t ip6_priority_l:4,
ip6_flow_h:4;
#endif
#else
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
uint8_t ip6_priority_h:4,
ip6_version:4;
uint8_t ip6_flow_h:4,
ip6_priority_l:4;
#elif (__BYTE_ORDER == __BIG_ENDIAN)
uint8_t ip6_version:4,
ip6_priority_h:4;
uint8_t ip6_priority_l:4,
ip6_flow_h:4;
#endif
#endif
uint16_t ip6_flow_l;
uint16_t ip6_plen;
uint8_t ip6_nxt;
uint8_t ip6_hlim;
uint8_t ip6_src[VR_IP6_ADDRESS_LEN];
uint8_t ip6_dst[VR_IP6_ADDRESS_LEN];
} __attribute__((packed));
#define VR_IP4_MAPPED_IP6_ZERO_BYTES 10
#define VR_IP4_MAPPED_IP6_ONE_BYTES 2
static inline uint8_t
vr_inet6_get_tos(struct vr_ip6 *ip6h)
{
return ((((ip6h->ip6_priority_h << 4) | (ip6h->ip6_priority_l)) >> 2) & 0x3F);
}
static inline void
vr_inet6_set_tos(struct vr_ip6 *ip6h, uint8_t tos)
{
ip6h->ip6_priority_h = ((tos << 2) >> 4);
ip6h->ip6_priority_l = ((tos << 2) & 0xF);
return;
}
static inline void
vr_inet6_generate_ip6(uint8_t *ip6, uint32_t ip)
{
memset(ip6, 0, VR_IP4_MAPPED_IP6_ZERO_BYTES);
memset(ip6 + VR_IP4_MAPPED_IP6_ZERO_BYTES, 1,
VR_IP4_MAPPED_IP6_ONE_BYTES);
memcpy(ip6 + VR_IP4_MAPPED_IP6_ZERO_BYTES + VR_IP4_MAPPED_IP6_ONE_BYTES,
&ip, sizeof(ip));
return;
}
struct tcphdr;
bool vr_ip_proto_pull(struct vr_ip *);
bool vr_ip6_proto_pull(struct vr_ip6 *);
int vr_ip_transport_parse(struct vr_ip *iph, struct vr_ip6 *ip6h,
void **thp, unsigned int frag_size,
void (do_tcp_mss_adj)(struct tcphdr *, unsigned short, unsigned char),
unsigned int *hlenp, unsigned short *th_csump, unsigned int *tcph_pull_lenp,
unsigned int *pull_lenp);
int vr_inner_pkt_parse(unsigned char *va,
int (*tunnel_type_cb)(unsigned int, unsigned int, unsigned short *),
int *encap_type, int *pkt_typep, unsigned int *pull_lenp,
unsigned int frag_size, struct vr_ip **iphp, struct vr_ip6 **ip6hp,
unsigned short gre_udp_encap, unsigned char ip_proto);
#define MCAST_IP (0xE0000000)
#define MCAST_IP_MASK (0xF0000000)
#define IS_BMCAST_IP(ip) \
(((ntohl(ip) & MCAST_IP_MASK) == MCAST_IP) || (ip == 0xFFFFFFFF))
#define VR_IP_ADDR_SIZE(type) \
((type == VP_TYPE_IP6) ? VR_IP6_ADDRESS_LEN \
: VR_IP_ADDRESS_LEN)
static inline unsigned char
vr_eth_proto_to_pkt_type(unsigned short eth_proto)
{
if (eth_proto == VR_ETH_PROTO_IP)
return VP_TYPE_IP;
else if (eth_proto == VR_ETH_PROTO_IP6)
return VP_TYPE_IP6;
else if (eth_proto == VR_ETH_PROTO_ARP)
return VP_TYPE_ARP;
else
return VP_TYPE_UNKNOWN;
}
static inline bool
vr_ip_is_ip4(struct vr_ip *iph)
{
if ((iph->ip_version & 0xf) == 0x4)
return true;
return false;
}
static inline bool
vr_ip_is_ip6(struct vr_ip *iph)
{
if ((iph->ip_version & 0xf) == 0x6)
return true;
return false;
}
static inline unsigned char *pkt_network_header(struct vr_packet *);
static inline bool
vr_ip_dont_fragment_set(struct vr_packet *pkt)
{
struct vr_ip *ip;
ip = (struct vr_ip *)pkt_network_header(pkt);
if (vr_ip_is_ip6(ip))
return true;
if (ntohs(ip->ip_frag_off) & VR_IP_DF)
return true;
return false;
}
static inline bool
vr_ip_fragment_tail(struct vr_ip *iph)
{
unsigned short frag = ntohs(iph->ip_frag_off);
bool more = (frag & VR_IP_MF) ? true : false;
unsigned short offset = frag & VR_IP_FRAG_OFFSET_MASK;
if (!vr_ip_is_ip4(iph))
return false;
if (!more && offset)
return true;
return false;
}
static inline bool
vr_pkt_is_ip(struct vr_packet *pkt)
{
if (pkt->vp_type == VP_TYPE_IPOIP || pkt->vp_type == VP_TYPE_IP ||
pkt->vp_type == VP_TYPE_IP6OIP)
return true;
return false;
}
static inline bool
vr_pkt_type_is_overlay(unsigned short type)
{
if (type == VP_TYPE_IPOIP || type == VP_TYPE_IP6OIP)
return true;
return false;
}
static inline bool
vr_pkt_needs_csum_gso_update(struct vr_packet *pkt)
{
if (pkt->vp_flags & VP_FLAG_FROM_DP) {
if (pkt->vp_flags & (VP_FLAG_CSUM_PARTIAL | VP_FLAG_GSO))
return true;
}
return false;
}
static inline bool
vr_pkt_is_diag(struct vr_packet *pkt)
{
if (pkt->vp_flags & VP_FLAG_DIAG)
return true;
return false;
}
static inline void
vr_pkt_set_diag(struct vr_packet *pkt)
{
pkt->vp_flags |= VP_FLAG_DIAG;
return;
}
static inline bool
vr_ip_fragment_head(struct vr_ip *iph)
{
unsigned short frag = ntohs(iph->ip_frag_off);
bool more = (frag & VR_IP_MF) ? true : false;
unsigned short offset = frag & VR_IP_FRAG_OFFSET_MASK;
if (!vr_ip_is_ip4(iph))
return false;
if (more && !offset)
return true;
return false;
}
static inline bool
vr_ip_fragment(struct vr_ip *iph)
{
unsigned short frag = ntohs(iph->ip_frag_off);
bool more = (frag & VR_IP_MF) ? true : false;
unsigned short offset = frag & VR_IP_FRAG_OFFSET_MASK;
if (!vr_ip_is_ip4(iph))
return false;
if (offset || more)
return true;
return false;
}
static inline bool
vr_ip_transport_header_valid(struct vr_ip *iph)
{
unsigned short frag = ntohs(iph->ip_frag_off);
unsigned short offset = frag & VR_IP_FRAG_OFFSET_MASK;
if (!vr_ip_is_ip4(iph))
return true;
if (offset)
return false;
return true;
}
#define VR_TCP_FLAG_FIN 0x0001
#define VR_TCP_FLAG_SYN 0x0002
#define VR_TCP_FLAG_RST 0x0004
#define VR_TCP_FLAG_PSH 0x0008
#define VR_TCP_FLAG_ACK 0x0010
#define VR_TCP_FLAG_URG 0x0020
#define VR_TCP_FLAG_ECN 0x0040
#define VR_TCP_FLAG_CWR 0x0080
#define VR_TCP_OFFSET(field) ((ntohs(field) & 0xF000) >> 12)
#define VR_TCP_FLAGS(field) (ntohs(field) & 0x01FF)
struct vr_tcp {
unsigned short tcp_sport;
unsigned short tcp_dport;
unsigned int tcp_seq;
unsigned int tcp_ack;
uint16_t tcp_offset_r_flags;
unsigned short tcp_win;
unsigned short tcp_csum;
unsigned short tcp_urg;
} __attribute__((packed));
struct vr_udp {
unsigned short udp_sport;
unsigned short udp_dport;
unsigned short udp_length;
unsigned short udp_csum;
} __attribute__((packed));
struct vr_sctp {
unsigned short sctp_sport;
unsigned short sctp_dport;
unsigned int sctp_vtag;
unsigned int sctp_csum;
} __attribute__((packed));
#define VR_ICMP_TYPE_ECHO_REPLY 0
#define VR_ICMP_TYPE_DEST_UNREACH 3
#define VR_ICMP_TYPE_ECHO 8
#define VR_ICMP_TYPE_TIME_EXCEEDED 11
#define VR_ICMP6_TYPE_PKT_TOO_BIG 2
#define VR_ICMP6_TYPE_ECHO_REQ 128
#define VR_ICMP6_TYPE_ECHO_REPLY 129
#define VR_ICMP6_TYPE_ROUTER_SOL 133
#define VR_ICMP6_TYPE_NEIGH_SOL 135
#define VR_ICMP6_TYPE_NEIGH_AD 136
#define VR_IP6_PROTO_FRAG 44
struct vr_icmp {
uint8_t icmp_type;
uint8_t icmp_code;
uint16_t icmp_csum;
/* now only for icmp echo */
uint16_t icmp_eid;
uint16_t icmp_eseq;
uint8_t icmp_data[0]; /* compatibility with ICMPv6 */
} __attribute__((packed));
static inline bool
vr_icmp_echo(struct vr_icmp *icmph)
{
uint8_t type = icmph->icmp_type;
if ((type == VR_ICMP_TYPE_ECHO) ||
(type == VR_ICMP_TYPE_ECHO_REPLY))
return true;
return false;
}
static inline bool
vr_icmp_error(struct vr_icmp *icmph)
{
uint8_t type = icmph->icmp_type;
if ((type == VR_ICMP_TYPE_DEST_UNREACH) ||
(type == VR_ICMP_TYPE_TIME_EXCEEDED))
return true;
return false;
}
static inline bool
vr_icmp6_error(struct vr_icmp *icmp6)
{
uint8_t type = icmp6->icmp_type;
if (type < 128)
return true;
return false;
}
struct vr_gre {
unsigned short gre_flags;
unsigned short gre_proto;
} __attribute__((packed));
struct vr_pcap {
/* timestamp seconds */
unsigned int pcap_ts_sec;
/* timestamp microseconds */
unsigned int pcap_ts_usec;
/* number of octets of packet saved in file */
unsigned int pcap_incl_len;
/* actual length of packet */
unsigned int pcap_orig_len;
};
struct vr_vxlan {
unsigned int vxlan_flags;
unsigned int vxlan_vnid;
} __attribute__((packed));
#define VR_VXLAN_IBIT 0x08000000
#define VR_VXLAN_RABIT 0x01000000
/*
* Mcast packet adds the following before replicating
* Original Transport + IP Header
* New Mpls header (4 bytes)
* New Udp header (It could be GRE Mpls or Udp Mpls tunnel. Wee need to
* take the maximum of two )
* New IP header
* New L2 header (eth + vlan)
*/
#define VR_L3_MCAST_PKT_HEAD_SPACE (sizeof(struct vr_eth) + \
sizeof(struct vr_vlan_hdr) + \
sizeof(struct vr_ip) + \
sizeof(struct vr_udp) + 4)
/*
* The complete VXlan header contains IP and UDP header
*/
#define VR_VXLAN_HDR_LEN (sizeof(struct vr_vxlan) + \
sizeof(struct vr_ip) + sizeof(struct vr_udp))
#define VR_L2_MCAST_CTRL_DATA (0x0000)
#define VR_L2_MCAST_CTRL_DATA_LEN 4
/*
* The L2 mcast head space contains Vxlan header and 4 bytes of control
* word inaddtion to L3 mcast head space
*/
#define VR_L2_MCAST_PKT_HEAD_SPACE (VR_L3_MCAST_PKT_HEAD_SPACE + \
VR_VXLAN_HDR_LEN + \
VR_L2_MCAST_CTRL_DATA_LEN)
extern unsigned short vr_ip_csum(struct vr_ip *);
extern unsigned short vr_generate_unique_ip_id(void);
extern void vr_proto_fragment(struct vr_interface *, struct vr_packet *);
extern unsigned short vr_ip_partial_csum(struct vr_ip *);
extern unsigned short vr_ip6_partial_csum(struct vr_ip6 *);
enum {
UNKNOWN_SOURCE,
TOR_SOURCE,
};
enum {
VR_LABEL_TYPE_UNKNOWN,
VR_LABEL_TYPE_MPLS,
VR_LABEL_TYPE_VXLAN_ID
};
/*
* forwarding metadata is something that is carried through out the
* forwarding path. we are constrained by what can be held in the
* packet, and hence this structure should be of great use. mostly
* a local variable (in stack), this should not cause performance
* degradation, if so used. please also watch what you are doing with
* this variable
*/
#define FMD_FLAG_LABEL_IS_VXLAN_ID 0x01
struct vr_forwarding_md {
int32_t fmd_flow_index;
int32_t fmd_label;
int8_t fmd_ecmp_nh_index;
int8_t fmd_ecmp_src_nh_index;
int16_t fmd_dvrf;
uint32_t fmd_outer_src_ip;
uint16_t fmd_vlan;
uint16_t fmd_udp_src_port;
uint8_t fmd_to_me;
uint8_t fmd_src;
uint8_t fmd_flags;
int8_t fmd_dscp;
int8_t fmd_dotonep;
int8_t fmd_queue;
};
static inline void
vr_init_forwarding_md(struct vr_forwarding_md *fmd)
{
fmd->fmd_flow_index = -1;
fmd->fmd_ecmp_nh_index = -1;
fmd->fmd_ecmp_src_nh_index = -1;
fmd->fmd_label = -1;
fmd->fmd_dvrf = -1;
fmd->fmd_outer_src_ip = 0;
fmd->fmd_vlan = VLAN_ID_INVALID;
fmd->fmd_udp_src_port = 0;
fmd->fmd_to_me = 0;
fmd->fmd_src = 0;
fmd->fmd_flags = 0;
fmd->fmd_dscp = -1;
fmd->fmd_dotonep = -1;
return;
}
static inline bool
vr_forwarding_md_label_is_vxlan_id(struct vr_forwarding_md *fmd)
{
if (fmd->fmd_flags & FMD_FLAG_LABEL_IS_VXLAN_ID)
return true;
return false;
}
static inline void
vr_forwarding_md_update_label_type(struct vr_forwarding_md *fmd,
unsigned int type)
{
if (type == VR_LABEL_TYPE_VXLAN_ID) {
fmd->fmd_flags |= FMD_FLAG_LABEL_IS_VXLAN_ID;
} else {
fmd->fmd_flags &= ~FMD_FLAG_LABEL_IS_VXLAN_ID;
}
return;
}
static inline void
vr_forwarding_md_set_label(struct vr_forwarding_md *fmd, unsigned int label,
unsigned int type)
{
fmd->fmd_label = label;
vr_forwarding_md_update_label_type(fmd, type);
return;
}
/*
* Size is : 2 Transport ports,
* IPV6 header which carried the above transport,
* ICMPV6 + IPV6 header generated by source of ICMP error,
* Fabric Tunnel headers, 2 ethernet headers and agent hdr
*/
#define VR_AGENT_MIN_PACKET_LEN ((2 * sizeof(unsigned short)) + \
sizeof(struct vr_ip6) + \
sizeof(struct vr_icmp) + \
sizeof(struct vr_ip6) + VR_VXLAN_HDR_LEN + \
VR_L2_MCAST_CTRL_DATA_LEN + \
(2 * VR_ETHER_HLEN) + sizeof(struct agent_hdr))
static inline bool
pkt_is_gso(struct vr_packet *pkt)
{
if (vr_pgso_size && vr_pgso_size(pkt))
return true;
return false;
}
static inline unsigned char *
pkt_data_at_offset(struct vr_packet *pkt, unsigned short off)
{
if (off < pkt->vp_end)
return pkt->vp_head + off;
return vr_data_at_offset(pkt, off);
}
static inline unsigned char *
pkt_data(struct vr_packet *pkt)
{
return pkt->vp_head + pkt->vp_data;
}