rte_ip.h File Reference

#include <stdint.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <rte_byteorder.h>
#include <rte_mbuf.h>

Go to the source code of this file.

Data Structures
struct	rte_ipv4_hdr
struct	rte_ipv6_hdr

Macros
#define	RTE_IPV4(a, b, c, d)
#define	RTE_IPV4_MAX_PKT_LEN   65535
#define	RTE_IPV4_HDR_IHL_MASK   (0x0f)
#define	RTE_IPV4_IHL_MULTIPLIER   (4)
#define	RTE_IPV4_ANY   ((uint32_t)0x00000000)
#define	RTE_IPV4_LOOPBACK   ((uint32_t)0x7f000001)
#define	RTE_IPV4_BROADCAST   ((uint32_t)0xe0000000)
#define	RTE_IPV4_ALLHOSTS_GROUP   ((uint32_t)0xe0000001)
#define	RTE_IPV4_ALLRTRS_GROUP   ((uint32_t)0xe0000002)
#define	RTE_IPV4_MAX_LOCAL_GROUP   ((uint32_t)0xe00000ff)
#define	RTE_IPV4_MIN_MCAST   RTE_IPV4(224, 0, 0, 0)
#define	RTE_IPV4_MAX_MCAST   RTE_IPV4(239, 255, 255, 255)
#define	RTE_IS_IPV4_MCAST(x)   ((x) >= RTE_IPV4_MIN_MCAST && (x) <= RTE_IPV4_MAX_MCAST)
#define	RTE_IPV6_MIN_MTU   1280

Functions
static uint16_t	rte_raw_cksum (const void *buf, size_t len)
static int	rte_raw_cksum_mbuf (const struct rte_mbuf *m, uint32_t off, uint32_t len, uint16_t *cksum)
static uint16_t	rte_ipv4_cksum (const struct rte_ipv4_hdr *ipv4_hdr)
static uint16_t	rte_ipv4_phdr_cksum (const struct rte_ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
static uint16_t	rte_ipv4_udptcp_cksum (const struct rte_ipv4_hdr *ipv4_hdr, const void *l4_hdr)
static uint16_t	rte_ipv6_phdr_cksum (const struct rte_ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
static uint16_t	rte_ipv6_udptcp_cksum (const struct rte_ipv6_hdr *ipv6_hdr, const void *l4_hdr)
static __rte_experimental int	rte_ipv6_get_next_ext (const uint8_t *p, int proto, size_t *ext_len)

Detailed Description

IP-related defines

Definition in file rte_ip.h.

Macro Definition Documentation

#define RTE_IPV4	(		a,
			b,
			c,
			d
	)

Value:

((uint32_t)(((a) & 0xff) << 24) | \
                       (((b) & 0xff) << 16) | \
                       (((c) & 0xff) << 8)  | \
                       ((d) & 0xff))

Create IPv4 address

Examples:

examples/flow_classify/flow_classify.c, examples/ip_fragmentation/main.c, examples/ip_reassembly/main.c, examples/ipv4_multicast/main.c, examples/l3fwd-acl/main.c, examples/l3fwd-graph/main.c, examples/l3fwd-power/main.c, examples/l3fwd/l3fwd_em.c, examples/l3fwd/l3fwd_lpm.c, and examples/performance-thread/l3fwd-thread/main.c.

Definition at line 47 of file rte_ip.h.

#define RTE_IPV4_MAX_PKT_LEN   65535

Maximal IPv4 packet length (including a header)

Examples:

examples/ipsec-secgw/ipsec-secgw.c.

Definition at line 53 of file rte_ip.h.

#define RTE_IPV4_HDR_IHL_MASK   (0x0f)

Internet header length mask for version_ihl field

Examples:

examples/l2fwd-crypto/main.c, and examples/l3fwd/l3fwd_em.c.

Definition at line 56 of file rte_ip.h.

#define RTE_IPV4_IHL_MULTIPLIER   (4)

Internet header length field multiplier (IHL field specifies overall header length in number of 4-byte words)

Examples:

examples/ipsec-secgw/sa.c, examples/l2fwd-crypto/main.c, and examples/l3fwd/l3fwd_em.c.

Definition at line 61 of file rte_ip.h.

#define RTE_IPV4_ANY   ((uint32_t)0x00000000)

0.0.0.0

Definition at line 83 of file rte_ip.h.

#define RTE_IPV4_LOOPBACK   ((uint32_t)0x7f000001)

127.0.0.1

Definition at line 84 of file rte_ip.h.

#define RTE_IPV4_BROADCAST   ((uint32_t)0xe0000000)

224.0.0.0

Definition at line 85 of file rte_ip.h.

#define RTE_IPV4_ALLHOSTS_GROUP   ((uint32_t)0xe0000001)

224.0.0.1

Definition at line 86 of file rte_ip.h.

#define RTE_IPV4_ALLRTRS_GROUP   ((uint32_t)0xe0000002)

224.0.0.2

Definition at line 87 of file rte_ip.h.

#define RTE_IPV4_MAX_LOCAL_GROUP   ((uint32_t)0xe00000ff)

224.0.0.255

Definition at line 88 of file rte_ip.h.

#define RTE_IPV4_MIN_MCAST   RTE_IPV4(224, 0, 0, 0)

Minimal IPv4-multicast address

Definition at line 93 of file rte_ip.h.

#define RTE_IPV4_MAX_MCAST   RTE_IPV4(239, 255, 255, 255)

Maximum IPv4 multicast address

Definition at line 95 of file rte_ip.h.

#define RTE_IS_IPV4_MCAST

(

x

)

((x) >= RTE_IPV4_MIN_MCAST && (x) <= RTE_IPV4_MAX_MCAST)

check if IPv4 address is multicast

Examples:

examples/ipv4_multicast/main.c.

Definition at line 98 of file rte_ip.h.

#define RTE_IPV6_MIN_MTU   1280

Minimum MTU for IPv6, see RFC 8200.

Definition at line 376 of file rte_ip.h.

Function Documentation

static uint16_t rte_raw_cksum ( const void *  buf, size_t  len  )

inlinestatic

Process the non-complemented checksum of a buffer.

Parameters

buf	Pointer to the buffer.
len	Length of the buffer.

Returns

The non-complemented checksum.

Definition at line 178 of file rte_ip.h.

static int rte_raw_cksum_mbuf ( const struct rte_mbuf *  m, uint32_t  off, uint32_t  len, uint16_t *  cksum  )

inlinestatic

Compute the raw (non complemented) checksum of a packet.

Parameters

m	The pointer to the mbuf.
off	The offset in bytes to start the checksum.
len	The length in bytes of the data to checksum.
cksum	A pointer to the checksum, filled on success.

Returns

0 on success, -1 on error (bad length or offset).

Definition at line 201 of file rte_ip.h.

static uint16_t rte_ipv4_cksum ( const struct rte_ipv4_hdr *  ipv4_hdr )

inlinestatic

Process the IPv4 checksum of an IPv4 header.

The checksum field must be set to 0 by the caller.

Parameters

ipv4_hdr

The pointer to the contiguous IPv4 header.

Returns

The complemented checksum to set in the IP packet.

Examples:

examples/ipsec-secgw/ipsec-secgw.c.

Definition at line 268 of file rte_ip.h.

static uint16_t rte_ipv4_phdr_cksum ( const struct rte_ipv4_hdr *  ipv4_hdr, uint64_t  ol_flags  )

inlinestatic

Process the pseudo-header checksum of an IPv4 header.

The checksum field must be set to 0 by the caller.

Depending on the ol_flags, the pseudo-header checksum expected by the drivers is not the same. For instance, when TSO is enabled, the IP payload length must not be included in the packet.

When ol_flags is 0, it computes the standard pseudo-header checksum.

Parameters

ipv4_hdr	The pointer to the contiguous IPv4 header.
ol_flags	The ol_flags of the associated mbuf.

Returns

The non-complemented checksum to set in the L4 header.

Examples:

examples/tep_termination/vxlan.c, and examples/vhost/main.c.

Definition at line 294 of file rte_ip.h.

static uint16_t rte_ipv4_udptcp_cksum ( const struct rte_ipv4_hdr *  ipv4_hdr, const void *  l4_hdr  )

inlinestatic

Process the IPv4 UDP or TCP checksum.

The IPv4 header should not contains options. The IP and layer 4 checksum must be set to 0 in the packet by the caller.

Parameters

ipv4_hdr	The pointer to the contiguous IPv4 header.
l4_hdr	The pointer to the beginning of the L4 header.

Returns

The complemented checksum to set in the IP packet or 0 on error

Definition at line 333 of file rte_ip.h.

static uint16_t rte_ipv6_phdr_cksum ( const struct rte_ipv6_hdr *  ipv6_hdr, uint64_t  ol_flags  )

inlinestatic

Process the pseudo-header checksum of an IPv6 header.

Depending on the ol_flags, the pseudo-header checksum expected by the drivers is not the same. For instance, when TSO is enabled, the IPv6 payload length must not be included in the packet.

When ol_flags is 0, it computes the standard pseudo-header checksum.

Parameters

ipv6_hdr	The pointer to the contiguous IPv6 header.
ol_flags	The ol_flags of the associated mbuf.

Returns

The non-complemented checksum to set in the L4 header.

Examples:

examples/tep_termination/vxlan.c, and examples/vhost/main.c.

Definition at line 395 of file rte_ip.h.

static uint16_t rte_ipv6_udptcp_cksum ( const struct rte_ipv6_hdr *  ipv6_hdr, const void *  l4_hdr  )

inlinestatic

Process the IPv6 UDP or TCP checksum.

The IPv4 header should not contains options. The layer 4 checksum must be set to 0 in the packet by the caller.

Parameters

ipv6_hdr	The pointer to the contiguous IPv6 header.
l4_hdr	The pointer to the beginning of the L4 header.

Returns

The complemented checksum to set in the IP packet.

Definition at line 431 of file rte_ip.h.

static __rte_experimental int rte_ipv6_get_next_ext ( const uint8_t *  p, int  proto, size_t *  ext_len  )

inlinestatic

Parse next IPv6 header extension

This function checks if proto number is an IPv6 extensions and parses its data if so, providing information on next header and extension length.

Parameters

p	Pointer to an extension raw data.
proto	Protocol number extracted from the "next header" field from the IPv6 header or the previous extension.
ext_len	Extension data length.

Returns

next protocol number if proto is an IPv6 extension, -EINVAL otherwise

Examples:

examples/ipsec-secgw/ipsec-secgw.c.

Definition at line 470 of file rte_ip.h.