rte_net.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2016 6WIND S.A.
 */

#ifndef _RTE_NET_PTYPE_H_
#define _RTE_NET_PTYPE_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <rte_ip.h>
#include <rte_udp.h>
#include <rte_tcp.h>
#include <rte_sctp.h>

struct rte_net_hdr_lens {
    uint8_t l2_len;
    uint8_t l3_len;
    uint8_t l4_len;
    uint8_t tunnel_len;
    uint8_t inner_l2_len;
    uint8_t inner_l3_len;
    uint8_t inner_l4_len;
};

int __rte_experimental
rte_net_skip_ip6_ext(uint16_t proto, const struct rte_mbuf *m, uint32_t *off,
    int *frag);

uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
    struct rte_net_hdr_lens *hdr_lens, uint32_t layers);

static inline int
rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
{
    /* Initialise ipv4_hdr to avoid false positive compiler warnings. */
    struct ipv4_hdr *ipv4_hdr = NULL;
    struct ipv6_hdr *ipv6_hdr;
    struct tcp_hdr *tcp_hdr;
    struct udp_hdr *udp_hdr;
    uint64_t inner_l3_offset = m->l2_len;

    if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
        inner_l3_offset += m->outer_l2_len + m->outer_l3_len;

    if (ol_flags & PKT_TX_IPV4) {
        ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
                inner_l3_offset);

        if (ol_flags & PKT_TX_IP_CKSUM)
            ipv4_hdr->hdr_checksum = 0;
    }

    if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM) {
        if (ol_flags & PKT_TX_IPV4) {
            udp_hdr = (struct udp_hdr *)((char *)ipv4_hdr +
                    m->l3_len);
            udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
                    ol_flags);
        } else {
            ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
                    inner_l3_offset);
            /* non-TSO udp */
            udp_hdr = rte_pktmbuf_mtod_offset(m, struct udp_hdr *,
                    inner_l3_offset + m->l3_len);
            udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
                    ol_flags);
        }
    } else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM ||
            (ol_flags & PKT_TX_TCP_SEG)) {
        if (ol_flags & PKT_TX_IPV4) {
            /* non-TSO tcp or TSO */
            tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr +
                    m->l3_len);
            tcp_hdr->cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
                    ol_flags);
        } else {
            ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
                    inner_l3_offset);
            /* non-TSO tcp or TSO */
            tcp_hdr = rte_pktmbuf_mtod_offset(m, struct tcp_hdr *,
                    inner_l3_offset + m->l3_len);
            tcp_hdr->cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
                    ol_flags);
        }
    }

    return 0;
}

static inline int
rte_net_intel_cksum_prepare(struct rte_mbuf *m)
{
    return rte_net_intel_cksum_flags_prepare(m, m->ol_flags);
}

#ifdef __cplusplus
}
#endif


#endif /* _RTE_NET_PTYPE_H_ */