#include <rte_esp.h>
#include <rte_ip.h>
#include <rte_errno.h>
+#include <rte_cryptodev.h>
#include "sa.h"
#include "ipsec_sqn.h"
+#include "crypto.h"
+#include "iph.h"
+#include "pad.h"
/* some helper structures */
struct crypto_xform {
memset(sa, 0, sa->size);
}
+/*
+ * Determine expected SA type based on input parameters.
+ */
static int
fill_sa_type(const struct rte_ipsec_sa_prm *prm, uint64_t *type)
{
return 0;
}
+/*
+ * Init ESP inbound specific things.
+ */
static void
esp_inb_init(struct rte_ipsec_sa *sa)
{
sa->ctp.cipher.length = sa->icv_len + sa->ctp.cipher.offset;
}
+/*
+ * Init ESP inbound tunnel specific things.
+ */
static void
esp_inb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm)
{
esp_inb_init(sa);
}
+/*
+ * Init ESP outbound specific things.
+ */
static void
esp_outb_init(struct rte_ipsec_sa *sa, uint32_t hlen)
{
}
}
+/*
+ * Init ESP outbound tunnel specific things.
+ */
static void
esp_outb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm)
{
esp_outb_init(sa, sa->hdr_len);
}
+/*
+ * helper function, init SA structure.
+ */
static int
esp_sa_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm,
const struct crypto_xform *cxf)
/* RFC 4106 */
if (cxf->aead->algo != RTE_CRYPTO_AEAD_AES_GCM)
return -EINVAL;
+ sa->aad_len = sizeof(struct aead_gcm_aad);
sa->icv_len = cxf->aead->digest_length;
sa->iv_ofs = cxf->aead->iv.offset;
sa->iv_len = sizeof(uint64_t);
return sz;
}
+static inline void
+mbuf_bulk_copy(struct rte_mbuf *dst[], struct rte_mbuf * const src[],
+ uint32_t num)
+{
+ uint32_t i;
+
+ for (i = 0; i != num; i++)
+ dst[i] = src[i];
+}
+
+/*
+ * setup crypto ops for LOOKASIDE_NONE (pure crypto) type of devices.
+ */
+static inline void
+lksd_none_cop_prepare(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num)
+{
+ uint32_t i;
+ struct rte_crypto_sym_op *sop;
+
+ for (i = 0; i != num; i++) {
+ sop = cop[i]->sym;
+ cop[i]->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
+ cop[i]->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
+ cop[i]->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
+ sop->m_src = mb[i];
+ __rte_crypto_sym_op_attach_sym_session(sop, ss->crypto.ses);
+ }
+}
+
+/*
+ * setup crypto op and crypto sym op for ESP outbound packet.
+ */
+static inline void
+esp_outb_cop_prepare(struct rte_crypto_op *cop,
+ const struct rte_ipsec_sa *sa, const uint64_t ivp[IPSEC_MAX_IV_QWORD],
+ const union sym_op_data *icv, uint32_t hlen, uint32_t plen)
+{
+ struct rte_crypto_sym_op *sop;
+ struct aead_gcm_iv *gcm;
+
+ /* fill sym op fields */
+ sop = cop->sym;
+
+ /* AEAD (AES_GCM) case */
+ if (sa->aad_len != 0) {
+ sop->aead.data.offset = sa->ctp.cipher.offset + hlen;
+ sop->aead.data.length = sa->ctp.cipher.length + plen;
+ sop->aead.digest.data = icv->va;
+ sop->aead.digest.phys_addr = icv->pa;
+ sop->aead.aad.data = icv->va + sa->icv_len;
+ sop->aead.aad.phys_addr = icv->pa + sa->icv_len;
+
+ /* fill AAD IV (located inside crypto op) */
+ gcm = rte_crypto_op_ctod_offset(cop, struct aead_gcm_iv *,
+ sa->iv_ofs);
+ aead_gcm_iv_fill(gcm, ivp[0], sa->salt);
+ /* CRYPT+AUTH case */
+ } else {
+ sop->cipher.data.offset = sa->ctp.cipher.offset + hlen;
+ sop->cipher.data.length = sa->ctp.cipher.length + plen;
+ sop->auth.data.offset = sa->ctp.auth.offset + hlen;
+ sop->auth.data.length = sa->ctp.auth.length + plen;
+ sop->auth.digest.data = icv->va;
+ sop->auth.digest.phys_addr = icv->pa;
+ }
+}
+
+/*
+ * setup/update packet data and metadata for ESP outbound tunnel case.
+ */
+static inline int32_t
+esp_outb_tun_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
+ const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb,
+ union sym_op_data *icv)
+{
+ uint32_t clen, hlen, l2len, pdlen, pdofs, plen, tlen;
+ struct rte_mbuf *ml;
+ struct esp_hdr *esph;
+ struct esp_tail *espt;
+ char *ph, *pt;
+ uint64_t *iv;
+
+ /* calculate extra header space required */
+ hlen = sa->hdr_len + sa->iv_len + sizeof(*esph);
+
+ /* size of ipsec protected data */
+ l2len = mb->l2_len;
+ plen = mb->pkt_len - mb->l2_len;
+
+ /* number of bytes to encrypt */
+ clen = plen + sizeof(*espt);
+ clen = RTE_ALIGN_CEIL(clen, sa->pad_align);
+
+ /* pad length + esp tail */
+ pdlen = clen - plen;
+ tlen = pdlen + sa->icv_len;
+
+ /* do append and prepend */
+ ml = rte_pktmbuf_lastseg(mb);
+ if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml))
+ return -ENOSPC;
+
+ /* prepend header */
+ ph = rte_pktmbuf_prepend(mb, hlen - l2len);
+ if (ph == NULL)
+ return -ENOSPC;
+
+ /* append tail */
+ pdofs = ml->data_len;
+ ml->data_len += tlen;
+ mb->pkt_len += tlen;
+ pt = rte_pktmbuf_mtod_offset(ml, typeof(pt), pdofs);
+
+ /* update pkt l2/l3 len */
+ mb->l2_len = sa->hdr_l3_off;
+ mb->l3_len = sa->hdr_len - sa->hdr_l3_off;
+
+ /* copy tunnel pkt header */
+ rte_memcpy(ph, sa->hdr, sa->hdr_len);
+
+ /* update original and new ip header fields */
+ update_tun_l3hdr(sa, ph + sa->hdr_l3_off, mb->pkt_len, sa->hdr_l3_off,
+ sqn_low16(sqc));
+
+ /* update spi, seqn and iv */
+ esph = (struct esp_hdr *)(ph + sa->hdr_len);
+ iv = (uint64_t *)(esph + 1);
+ rte_memcpy(iv, ivp, sa->iv_len);
+
+ esph->spi = sa->spi;
+ esph->seq = sqn_low32(sqc);
+
+ /* offset for ICV */
+ pdofs += pdlen + sa->sqh_len;
+
+ /* pad length */
+ pdlen -= sizeof(*espt);
+
+ /* copy padding data */
+ rte_memcpy(pt, esp_pad_bytes, pdlen);
+
+ /* update esp trailer */
+ espt = (struct esp_tail *)(pt + pdlen);
+ espt->pad_len = pdlen;
+ espt->next_proto = sa->proto;
+
+ icv->va = rte_pktmbuf_mtod_offset(ml, void *, pdofs);
+ icv->pa = rte_pktmbuf_iova_offset(ml, pdofs);
+
+ return clen;
+}
+
+/*
+ * for pure cryptodev (lookaside none) depending on SA settings,
+ * we might have to write some extra data to the packet.
+ */
+static inline void
+outb_pkt_xprepare(const struct rte_ipsec_sa *sa, rte_be64_t sqc,
+ const union sym_op_data *icv)
+{
+ uint32_t *psqh;
+ struct aead_gcm_aad *aad;
+
+ /* insert SQN.hi between ESP trailer and ICV */
+ if (sa->sqh_len != 0) {
+ psqh = (uint32_t *)(icv->va - sa->sqh_len);
+ psqh[0] = sqn_hi32(sqc);
+ }
+
+ /*
+ * fill IV and AAD fields, if any (aad fields are placed after icv),
+ * right now we support only one AEAD algorithm: AES-GCM .
+ */
+ if (sa->aad_len != 0) {
+ aad = (struct aead_gcm_aad *)(icv->va + sa->icv_len);
+ aead_gcm_aad_fill(aad, sa->spi, sqc, IS_ESN(sa));
+ }
+}
+
+/*
+ * setup/update packets and crypto ops for ESP outbound tunnel case.
+ */
+static uint16_t
+outb_tun_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ struct rte_crypto_op *cop[], uint16_t num)
+{
+ int32_t rc;
+ uint32_t i, k, n;
+ uint64_t sqn;
+ rte_be64_t sqc;
+ struct rte_ipsec_sa *sa;
+ union sym_op_data icv;
+ uint64_t iv[IPSEC_MAX_IV_QWORD];
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ n = num;
+ sqn = esn_outb_update_sqn(sa, &n);
+ if (n != num)
+ rte_errno = EOVERFLOW;
+
+ k = 0;
+ for (i = 0; i != n; i++) {
+
+ sqc = rte_cpu_to_be_64(sqn + i);
+ gen_iv(iv, sqc);
+
+ /* try to update the packet itself */
+ rc = esp_outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv);
+
+ /* success, setup crypto op */
+ if (rc >= 0) {
+ mb[k] = mb[i];
+ outb_pkt_xprepare(sa, sqc, &icv);
+ esp_outb_cop_prepare(cop[k], sa, iv, &icv, 0, rc);
+ k++;
+ /* failure, put packet into the death-row */
+ } else {
+ dr[i - k] = mb[i];
+ rte_errno = -rc;
+ }
+ }
+
+ /* update cops */
+ lksd_none_cop_prepare(ss, mb, cop, k);
+
+ /* copy not prepared mbufs beyond good ones */
+ if (k != n && k != 0)
+ mbuf_bulk_copy(mb + k, dr, n - k);
+
+ return k;
+}
+
+/*
+ * setup/update packet data and metadata for ESP outbound transport case.
+ */
+static inline int32_t
+esp_outb_trs_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc,
+ const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb,
+ uint32_t l2len, uint32_t l3len, union sym_op_data *icv)
+{
+ uint8_t np;
+ uint32_t clen, hlen, pdlen, pdofs, plen, tlen, uhlen;
+ struct rte_mbuf *ml;
+ struct esp_hdr *esph;
+ struct esp_tail *espt;
+ char *ph, *pt;
+ uint64_t *iv;
+
+ uhlen = l2len + l3len;
+ plen = mb->pkt_len - uhlen;
+
+ /* calculate extra header space required */
+ hlen = sa->iv_len + sizeof(*esph);
+
+ /* number of bytes to encrypt */
+ clen = plen + sizeof(*espt);
+ clen = RTE_ALIGN_CEIL(clen, sa->pad_align);
+
+ /* pad length + esp tail */
+ pdlen = clen - plen;
+ tlen = pdlen + sa->icv_len;
+
+ /* do append and insert */
+ ml = rte_pktmbuf_lastseg(mb);
+ if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml))
+ return -ENOSPC;
+
+ /* prepend space for ESP header */
+ ph = rte_pktmbuf_prepend(mb, hlen);
+ if (ph == NULL)
+ return -ENOSPC;
+
+ /* append tail */
+ pdofs = ml->data_len;
+ ml->data_len += tlen;
+ mb->pkt_len += tlen;
+ pt = rte_pktmbuf_mtod_offset(ml, typeof(pt), pdofs);
+
+ /* shift L2/L3 headers */
+ insert_esph(ph, ph + hlen, uhlen);
+
+ /* update ip header fields */
+ np = update_trs_l3hdr(sa, ph + l2len, mb->pkt_len, l2len, l3len,
+ IPPROTO_ESP);
+
+ /* update spi, seqn and iv */
+ esph = (struct esp_hdr *)(ph + uhlen);
+ iv = (uint64_t *)(esph + 1);
+ rte_memcpy(iv, ivp, sa->iv_len);
+
+ esph->spi = sa->spi;
+ esph->seq = sqn_low32(sqc);
+
+ /* offset for ICV */
+ pdofs += pdlen + sa->sqh_len;
+
+ /* pad length */
+ pdlen -= sizeof(*espt);
+
+ /* copy padding data */
+ rte_memcpy(pt, esp_pad_bytes, pdlen);
+
+ /* update esp trailer */
+ espt = (struct esp_tail *)(pt + pdlen);
+ espt->pad_len = pdlen;
+ espt->next_proto = np;
+
+ icv->va = rte_pktmbuf_mtod_offset(ml, void *, pdofs);
+ icv->pa = rte_pktmbuf_iova_offset(ml, pdofs);
+
+ return clen;
+}
+
+/*
+ * setup/update packets and crypto ops for ESP outbound transport case.
+ */
+static uint16_t
+outb_trs_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ struct rte_crypto_op *cop[], uint16_t num)
+{
+ int32_t rc;
+ uint32_t i, k, n, l2, l3;
+ uint64_t sqn;
+ rte_be64_t sqc;
+ struct rte_ipsec_sa *sa;
+ union sym_op_data icv;
+ uint64_t iv[IPSEC_MAX_IV_QWORD];
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ n = num;
+ sqn = esn_outb_update_sqn(sa, &n);
+ if (n != num)
+ rte_errno = EOVERFLOW;
+
+ k = 0;
+ for (i = 0; i != n; i++) {
+
+ l2 = mb[i]->l2_len;
+ l3 = mb[i]->l3_len;
+
+ sqc = rte_cpu_to_be_64(sqn + i);
+ gen_iv(iv, sqc);
+
+ /* try to update the packet itself */
+ rc = esp_outb_trs_pkt_prepare(sa, sqc, iv, mb[i],
+ l2, l3, &icv);
+
+ /* success, setup crypto op */
+ if (rc >= 0) {
+ mb[k] = mb[i];
+ outb_pkt_xprepare(sa, sqc, &icv);
+ esp_outb_cop_prepare(cop[k], sa, iv, &icv, l2 + l3, rc);
+ k++;
+ /* failure, put packet into the death-row */
+ } else {
+ dr[i - k] = mb[i];
+ rte_errno = -rc;
+ }
+ }
+
+ /* update cops */
+ lksd_none_cop_prepare(ss, mb, cop, k);
+
+ /* copy not prepared mbufs beyond good ones */
+ if (k != n && k != 0)
+ mbuf_bulk_copy(mb + k, dr, n - k);
+
+ return k;
+}
+
+/*
+ * setup crypto op and crypto sym op for ESP inbound tunnel packet.
+ */
+static inline int32_t
+esp_inb_tun_cop_prepare(struct rte_crypto_op *cop,
+ const struct rte_ipsec_sa *sa, struct rte_mbuf *mb,
+ const union sym_op_data *icv, uint32_t pofs, uint32_t plen)
+{
+ struct rte_crypto_sym_op *sop;
+ struct aead_gcm_iv *gcm;
+ uint64_t *ivc, *ivp;
+ uint32_t clen;
+
+ clen = plen - sa->ctp.cipher.length;
+ if ((int32_t)clen < 0 || (clen & (sa->pad_align - 1)) != 0)
+ return -EINVAL;
+
+ /* fill sym op fields */
+ sop = cop->sym;
+
+ /* AEAD (AES_GCM) case */
+ if (sa->aad_len != 0) {
+ sop->aead.data.offset = pofs + sa->ctp.cipher.offset;
+ sop->aead.data.length = clen;
+ sop->aead.digest.data = icv->va;
+ sop->aead.digest.phys_addr = icv->pa;
+ sop->aead.aad.data = icv->va + sa->icv_len;
+ sop->aead.aad.phys_addr = icv->pa + sa->icv_len;
+
+ /* fill AAD IV (located inside crypto op) */
+ gcm = rte_crypto_op_ctod_offset(cop, struct aead_gcm_iv *,
+ sa->iv_ofs);
+ ivp = rte_pktmbuf_mtod_offset(mb, uint64_t *,
+ pofs + sizeof(struct esp_hdr));
+ aead_gcm_iv_fill(gcm, ivp[0], sa->salt);
+ /* CRYPT+AUTH case */
+ } else {
+ sop->cipher.data.offset = pofs + sa->ctp.cipher.offset;
+ sop->cipher.data.length = clen;
+ sop->auth.data.offset = pofs + sa->ctp.auth.offset;
+ sop->auth.data.length = plen - sa->ctp.auth.length;
+ sop->auth.digest.data = icv->va;
+ sop->auth.digest.phys_addr = icv->pa;
+
+ /* copy iv from the input packet to the cop */
+ ivc = rte_crypto_op_ctod_offset(cop, uint64_t *, sa->iv_ofs);
+ ivp = rte_pktmbuf_mtod_offset(mb, uint64_t *,
+ pofs + sizeof(struct esp_hdr));
+ rte_memcpy(ivc, ivp, sa->iv_len);
+ }
+ return 0;
+}
+
+/*
+ * for pure cryptodev (lookaside none) depending on SA settings,
+ * we might have to write some extra data to the packet.
+ */
+static inline void
+inb_pkt_xprepare(const struct rte_ipsec_sa *sa, rte_be64_t sqc,
+ const union sym_op_data *icv)
+{
+ struct aead_gcm_aad *aad;
+
+ /* insert SQN.hi between ESP trailer and ICV */
+ if (sa->sqh_len != 0)
+ insert_sqh(sqn_hi32(sqc), icv->va, sa->icv_len);
+
+ /*
+ * fill AAD fields, if any (aad fields are placed after icv),
+ * right now we support only one AEAD algorithm: AES-GCM.
+ */
+ if (sa->aad_len != 0) {
+ aad = (struct aead_gcm_aad *)(icv->va + sa->icv_len);
+ aead_gcm_aad_fill(aad, sa->spi, sqc, IS_ESN(sa));
+ }
+}
+
+/*
+ * setup/update packet data and metadata for ESP inbound tunnel case.
+ */
+static inline int32_t
+esp_inb_tun_pkt_prepare(const struct rte_ipsec_sa *sa,
+ const struct replay_sqn *rsn, struct rte_mbuf *mb,
+ uint32_t hlen, union sym_op_data *icv)
+{
+ int32_t rc;
+ uint64_t sqn;
+ uint32_t icv_ofs, plen;
+ struct rte_mbuf *ml;
+ struct esp_hdr *esph;
+
+ esph = rte_pktmbuf_mtod_offset(mb, struct esp_hdr *, hlen);
+
+ /*
+ * retrieve and reconstruct SQN, then check it, then
+ * convert it back into network byte order.
+ */
+ sqn = rte_be_to_cpu_32(esph->seq);
+ if (IS_ESN(sa))
+ sqn = reconstruct_esn(rsn->sqn, sqn, sa->replay.win_sz);
+
+ rc = esn_inb_check_sqn(rsn, sa, sqn);
+ if (rc != 0)
+ return rc;
+
+ sqn = rte_cpu_to_be_64(sqn);
+
+ /* start packet manipulation */
+ plen = mb->pkt_len;
+ plen = plen - hlen;
+
+ ml = rte_pktmbuf_lastseg(mb);
+ icv_ofs = ml->data_len - sa->icv_len + sa->sqh_len;
+
+ /* we have to allocate space for AAD somewhere,
+ * right now - just use free trailing space at the last segment.
+ * Would probably be more convenient to reserve space for AAD
+ * inside rte_crypto_op itself
+ * (again for IV space is already reserved inside cop).
+ */
+ if (sa->aad_len + sa->sqh_len > rte_pktmbuf_tailroom(ml))
+ return -ENOSPC;
+
+ icv->va = rte_pktmbuf_mtod_offset(ml, void *, icv_ofs);
+ icv->pa = rte_pktmbuf_iova_offset(ml, icv_ofs);
+
+ inb_pkt_xprepare(sa, sqn, icv);
+ return plen;
+}
+
+/*
+ * setup/update packets and crypto ops for ESP inbound case.
+ */
+static uint16_t
+inb_pkt_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ struct rte_crypto_op *cop[], uint16_t num)
+{
+ int32_t rc;
+ uint32_t i, k, hl;
+ struct rte_ipsec_sa *sa;
+ struct replay_sqn *rsn;
+ union sym_op_data icv;
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+ rsn = sa->sqn.inb;
+
+ k = 0;
+ for (i = 0; i != num; i++) {
+
+ hl = mb[i]->l2_len + mb[i]->l3_len;
+ rc = esp_inb_tun_pkt_prepare(sa, rsn, mb[i], hl, &icv);
+ if (rc >= 0)
+ rc = esp_inb_tun_cop_prepare(cop[k], sa, mb[i], &icv,
+ hl, rc);
+
+ if (rc == 0)
+ mb[k++] = mb[i];
+ else {
+ dr[i - k] = mb[i];
+ rte_errno = -rc;
+ }
+ }
+
+ /* update cops */
+ lksd_none_cop_prepare(ss, mb, cop, k);
+
+ /* copy not prepared mbufs beyond good ones */
+ if (k != num && k != 0)
+ mbuf_bulk_copy(mb + k, dr, num - k);
+
+ return k;
+}
+
+/*
+ * setup crypto ops for LOOKASIDE_PROTO type of devices.
+ */
+static inline void
+lksd_proto_cop_prepare(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num)
+{
+ uint32_t i;
+ struct rte_crypto_sym_op *sop;
+
+ for (i = 0; i != num; i++) {
+ sop = cop[i]->sym;
+ cop[i]->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
+ cop[i]->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
+ cop[i]->sess_type = RTE_CRYPTO_OP_SECURITY_SESSION;
+ sop->m_src = mb[i];
+ __rte_security_attach_session(sop, ss->security.ses);
+ }
+}
+
+/*
+ * setup packets and crypto ops for LOOKASIDE_PROTO type of devices.
+ * Note that for LOOKASIDE_PROTO all packet modifications will be
+ * performed by PMD/HW.
+ * SW has only to prepare crypto op.
+ */
+static uint16_t
+lksd_proto_prepare(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num)
+{
+ lksd_proto_cop_prepare(ss, mb, cop, num);
+ return num;
+}
+
+/*
+ * process ESP inbound tunnel packet.
+ */
+static inline int
+esp_inb_tun_single_pkt_process(struct rte_ipsec_sa *sa, struct rte_mbuf *mb,
+ uint32_t *sqn)
+{
+ uint32_t hlen, icv_len, tlen;
+ struct esp_hdr *esph;
+ struct esp_tail *espt;
+ struct rte_mbuf *ml;
+ char *pd;
+
+ if (mb->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED)
+ return -EBADMSG;
+
+ icv_len = sa->icv_len;
+
+ ml = rte_pktmbuf_lastseg(mb);
+ espt = rte_pktmbuf_mtod_offset(ml, struct esp_tail *,
+ ml->data_len - icv_len - sizeof(*espt));
+
+ /*
+ * check padding and next proto.
+ * return an error if something is wrong.
+ */
+ pd = (char *)espt - espt->pad_len;
+ if (espt->next_proto != sa->proto ||
+ memcmp(pd, esp_pad_bytes, espt->pad_len))
+ return -EINVAL;
+
+ /* cut of ICV, ESP tail and padding bytes */
+ tlen = icv_len + sizeof(*espt) + espt->pad_len;
+ ml->data_len -= tlen;
+ mb->pkt_len -= tlen;
+
+ /* cut of L2/L3 headers, ESP header and IV */
+ hlen = mb->l2_len + mb->l3_len;
+ esph = rte_pktmbuf_mtod_offset(mb, struct esp_hdr *, hlen);
+ rte_pktmbuf_adj(mb, hlen + sa->ctp.cipher.offset);
+
+ /* retrieve SQN for later check */
+ *sqn = rte_be_to_cpu_32(esph->seq);
+
+ /* reset mbuf metatdata: L2/L3 len, packet type */
+ mb->packet_type = RTE_PTYPE_UNKNOWN;
+ mb->l2_len = 0;
+ mb->l3_len = 0;
+
+ /* clear the PKT_RX_SEC_OFFLOAD flag if set */
+ mb->ol_flags &= ~(mb->ol_flags & PKT_RX_SEC_OFFLOAD);
+ return 0;
+}
+
+/*
+ * process ESP inbound transport packet.
+ */
+static inline int
+esp_inb_trs_single_pkt_process(struct rte_ipsec_sa *sa, struct rte_mbuf *mb,
+ uint32_t *sqn)
+{
+ uint32_t hlen, icv_len, l2len, l3len, tlen;
+ struct esp_hdr *esph;
+ struct esp_tail *espt;
+ struct rte_mbuf *ml;
+ char *np, *op, *pd;
+
+ if (mb->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED)
+ return -EBADMSG;
+
+ icv_len = sa->icv_len;
+
+ ml = rte_pktmbuf_lastseg(mb);
+ espt = rte_pktmbuf_mtod_offset(ml, struct esp_tail *,
+ ml->data_len - icv_len - sizeof(*espt));
+
+ /* check padding, return an error if something is wrong. */
+ pd = (char *)espt - espt->pad_len;
+ if (memcmp(pd, esp_pad_bytes, espt->pad_len))
+ return -EINVAL;
+
+ /* cut of ICV, ESP tail and padding bytes */
+ tlen = icv_len + sizeof(*espt) + espt->pad_len;
+ ml->data_len -= tlen;
+ mb->pkt_len -= tlen;
+
+ /* retrieve SQN for later check */
+ l2len = mb->l2_len;
+ l3len = mb->l3_len;
+ hlen = l2len + l3len;
+ op = rte_pktmbuf_mtod(mb, char *);
+ esph = (struct esp_hdr *)(op + hlen);
+ *sqn = rte_be_to_cpu_32(esph->seq);
+
+ /* cut off ESP header and IV, update L3 header */
+ np = rte_pktmbuf_adj(mb, sa->ctp.cipher.offset);
+ remove_esph(np, op, hlen);
+ update_trs_l3hdr(sa, np + l2len, mb->pkt_len, l2len, l3len,
+ espt->next_proto);
+
+ /* reset mbuf packet type */
+ mb->packet_type &= (RTE_PTYPE_L2_MASK | RTE_PTYPE_L3_MASK);
+
+ /* clear the PKT_RX_SEC_OFFLOAD flag if set */
+ mb->ol_flags &= ~(mb->ol_flags & PKT_RX_SEC_OFFLOAD);
+ return 0;
+}
+
+/*
+ * for group of ESP inbound packets perform SQN check and update.
+ */
+static inline uint16_t
+esp_inb_rsn_update(struct rte_ipsec_sa *sa, const uint32_t sqn[],
+ struct rte_mbuf *mb[], struct rte_mbuf *dr[], uint16_t num)
+{
+ uint32_t i, k;
+ struct replay_sqn *rsn;
+
+ rsn = sa->sqn.inb;
+
+ k = 0;
+ for (i = 0; i != num; i++) {
+ if (esn_inb_update_sqn(rsn, sa, sqn[i]) == 0)
+ mb[k++] = mb[i];
+ else
+ dr[i - k] = mb[i];
+ }
+
+ return k;
+}
+
+/*
+ * process group of ESP inbound tunnel packets.
+ */
+static uint16_t
+inb_tun_pkt_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ uint16_t num)
+{
+ uint32_t i, k;
+ struct rte_ipsec_sa *sa;
+ uint32_t sqn[num];
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ /* process packets, extract seq numbers */
+
+ k = 0;
+ for (i = 0; i != num; i++) {
+ /* good packet */
+ if (esp_inb_tun_single_pkt_process(sa, mb[i], sqn + k) == 0)
+ mb[k++] = mb[i];
+ /* bad packet, will drop from furhter processing */
+ else
+ dr[i - k] = mb[i];
+ }
+
+ /* update seq # and replay winow */
+ k = esp_inb_rsn_update(sa, sqn, mb, dr + i - k, k);
+
+ /* handle unprocessed mbufs */
+ if (k != num) {
+ rte_errno = EBADMSG;
+ if (k != 0)
+ mbuf_bulk_copy(mb + k, dr, num - k);
+ }
+
+ return k;
+}
+
+/*
+ * process group of ESP inbound transport packets.
+ */
+static uint16_t
+inb_trs_pkt_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ uint16_t num)
+{
+ uint32_t i, k;
+ uint32_t sqn[num];
+ struct rte_ipsec_sa *sa;
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ /* process packets, extract seq numbers */
+
+ k = 0;
+ for (i = 0; i != num; i++) {
+ /* good packet */
+ if (esp_inb_trs_single_pkt_process(sa, mb[i], sqn + k) == 0)
+ mb[k++] = mb[i];
+ /* bad packet, will drop from furhter processing */
+ else
+ dr[i - k] = mb[i];
+ }
+
+ /* update seq # and replay winow */
+ k = esp_inb_rsn_update(sa, sqn, mb, dr + i - k, k);
+
+ /* handle unprocessed mbufs */
+ if (k != num) {
+ rte_errno = EBADMSG;
+ if (k != 0)
+ mbuf_bulk_copy(mb + k, dr, num - k);
+ }
+
+ return k;
+}
+
+/*
+ * process outbound packets for SA with ESN support,
+ * for algorithms that require SQN.hibits to be implictly included
+ * into digest computation.
+ * In that case we have to move ICV bytes back to their proper place.
+ */
+static uint16_t
+outb_sqh_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ uint16_t num)
+{
+ uint32_t i, k, icv_len, *icv;
+ struct rte_mbuf *ml;
+ struct rte_ipsec_sa *sa;
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ k = 0;
+ icv_len = sa->icv_len;
+
+ for (i = 0; i != num; i++) {
+ if ((mb[i]->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) == 0) {
+ ml = rte_pktmbuf_lastseg(mb[i]);
+ icv = rte_pktmbuf_mtod_offset(ml, void *,
+ ml->data_len - icv_len);
+ remove_sqh(icv, icv_len);
+ mb[k++] = mb[i];
+ } else
+ dr[i - k] = mb[i];
+ }
+
+ /* handle unprocessed mbufs */
+ if (k != num) {
+ rte_errno = EBADMSG;
+ if (k != 0)
+ mbuf_bulk_copy(mb + k, dr, num - k);
+ }
+
+ return k;
+}
+
+/*
+ * simplest pkt process routine:
+ * all actual processing is already done by HW/PMD,
+ * just check mbuf ol_flags.
+ * used for:
+ * - inbound for RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL
+ * - inbound/outbound for RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL
+ * - outbound for RTE_SECURITY_ACTION_TYPE_NONE when ESN is disabled
+ */
+static uint16_t
+pkt_flag_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[],
+ uint16_t num)
+{
+ uint32_t i, k;
+ struct rte_mbuf *dr[num];
+
+ RTE_SET_USED(ss);
+
+ k = 0;
+ for (i = 0; i != num; i++) {
+ if ((mb[i]->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) == 0)
+ mb[k++] = mb[i];
+ else
+ dr[i - k] = mb[i];
+ }
+
+ /* handle unprocessed mbufs */
+ if (k != num) {
+ rte_errno = EBADMSG;
+ if (k != 0)
+ mbuf_bulk_copy(mb + k, dr, num - k);
+ }
+
+ return k;
+}
+
+/*
+ * prepare packets for inline ipsec processing:
+ * set ol_flags and attach metadata.
+ */
+static inline void
+inline_outb_mbuf_prepare(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], uint16_t num)
+{
+ uint32_t i, ol_flags;
+
+ ol_flags = ss->security.ol_flags & RTE_SECURITY_TX_OLOAD_NEED_MDATA;
+ for (i = 0; i != num; i++) {
+
+ mb[i]->ol_flags |= PKT_TX_SEC_OFFLOAD;
+ if (ol_flags != 0)
+ rte_security_set_pkt_metadata(ss->security.ctx,
+ ss->security.ses, mb[i], NULL);
+ }
+}
+
+/*
+ * process group of ESP outbound tunnel packets destined for
+ * INLINE_CRYPTO type of device.
+ */
+static uint16_t
+inline_outb_tun_pkt_process(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], uint16_t num)
+{
+ int32_t rc;
+ uint32_t i, k, n;
+ uint64_t sqn;
+ rte_be64_t sqc;
+ struct rte_ipsec_sa *sa;
+ union sym_op_data icv;
+ uint64_t iv[IPSEC_MAX_IV_QWORD];
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ n = num;
+ sqn = esn_outb_update_sqn(sa, &n);
+ if (n != num)
+ rte_errno = EOVERFLOW;
+
+ k = 0;
+ for (i = 0; i != n; i++) {
+
+ sqc = rte_cpu_to_be_64(sqn + i);
+ gen_iv(iv, sqc);
+
+ /* try to update the packet itself */
+ rc = esp_outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv);
+
+ /* success, update mbuf fields */
+ if (rc >= 0)
+ mb[k++] = mb[i];
+ /* failure, put packet into the death-row */
+ else {
+ dr[i - k] = mb[i];
+ rte_errno = -rc;
+ }
+ }
+
+ inline_outb_mbuf_prepare(ss, mb, k);
+
+ /* copy not processed mbufs beyond good ones */
+ if (k != n && k != 0)
+ mbuf_bulk_copy(mb + k, dr, n - k);
+
+ return k;
+}
+
+/*
+ * process group of ESP outbound transport packets destined for
+ * INLINE_CRYPTO type of device.
+ */
+static uint16_t
+inline_outb_trs_pkt_process(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], uint16_t num)
+{
+ int32_t rc;
+ uint32_t i, k, n, l2, l3;
+ uint64_t sqn;
+ rte_be64_t sqc;
+ struct rte_ipsec_sa *sa;
+ union sym_op_data icv;
+ uint64_t iv[IPSEC_MAX_IV_QWORD];
+ struct rte_mbuf *dr[num];
+
+ sa = ss->sa;
+
+ n = num;
+ sqn = esn_outb_update_sqn(sa, &n);
+ if (n != num)
+ rte_errno = EOVERFLOW;
+
+ k = 0;
+ for (i = 0; i != n; i++) {
+
+ l2 = mb[i]->l2_len;
+ l3 = mb[i]->l3_len;
+
+ sqc = rte_cpu_to_be_64(sqn + i);
+ gen_iv(iv, sqc);
+
+ /* try to update the packet itself */
+ rc = esp_outb_trs_pkt_prepare(sa, sqc, iv, mb[i],
+ l2, l3, &icv);
+
+ /* success, update mbuf fields */
+ if (rc >= 0)
+ mb[k++] = mb[i];
+ /* failure, put packet into the death-row */
+ else {
+ dr[i - k] = mb[i];
+ rte_errno = -rc;
+ }
+ }
+
+ inline_outb_mbuf_prepare(ss, mb, k);
+
+ /* copy not processed mbufs beyond good ones */
+ if (k != n && k != 0)
+ mbuf_bulk_copy(mb + k, dr, n - k);
+
+ return k;
+}
+
+/*
+ * outbound for RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
+ * actual processing is done by HW/PMD, just set flags and metadata.
+ */
+static uint16_t
+outb_inline_proto_process(const struct rte_ipsec_session *ss,
+ struct rte_mbuf *mb[], uint16_t num)
+{
+ inline_outb_mbuf_prepare(ss, mb, num);
+ return num;
+}
+
+/*
+ * Select packet processing function for session on LOOKASIDE_NONE
+ * type of device.
+ */
+static int
+lksd_none_pkt_func_select(const struct rte_ipsec_sa *sa,
+ struct rte_ipsec_sa_pkt_func *pf)
+{
+ int32_t rc;
+
+ static const uint64_t msk = RTE_IPSEC_SATP_DIR_MASK |
+ RTE_IPSEC_SATP_MODE_MASK;
+
+ rc = 0;
+ switch (sa->type & msk) {
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV4):
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV6):
+ pf->prepare = inb_pkt_prepare;
+ pf->process = inb_tun_pkt_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TRANS):
+ pf->prepare = inb_pkt_prepare;
+ pf->process = inb_trs_pkt_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV4):
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV6):
+ pf->prepare = outb_tun_prepare;
+ pf->process = (sa->sqh_len != 0) ?
+ outb_sqh_process : pkt_flag_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TRANS):
+ pf->prepare = outb_trs_prepare;
+ pf->process = (sa->sqh_len != 0) ?
+ outb_sqh_process : pkt_flag_process;
+ break;
+ default:
+ rc = -ENOTSUP;
+ }
+
+ return rc;
+}
+
+/*
+ * Select packet processing function for session on INLINE_CRYPTO
+ * type of device.
+ */
+static int
+inline_crypto_pkt_func_select(const struct rte_ipsec_sa *sa,
+ struct rte_ipsec_sa_pkt_func *pf)
+{
+ int32_t rc;
+
+ static const uint64_t msk = RTE_IPSEC_SATP_DIR_MASK |
+ RTE_IPSEC_SATP_MODE_MASK;
+
+ rc = 0;
+ switch (sa->type & msk) {
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV4):
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV6):
+ pf->process = inb_tun_pkt_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TRANS):
+ pf->process = inb_trs_pkt_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV4):
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV6):
+ pf->process = inline_outb_tun_pkt_process;
+ break;
+ case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TRANS):
+ pf->process = inline_outb_trs_pkt_process;
+ break;
+ default:
+ rc = -ENOTSUP;
+ }
+
+ return rc;
+}
+
+/*
+ * Select packet processing function for given session based on SA parameters
+ * and type of associated with the session device.
+ */
int
ipsec_sa_pkt_func_select(const struct rte_ipsec_session *ss,
const struct rte_ipsec_sa *sa, struct rte_ipsec_sa_pkt_func *pf)
{
int32_t rc;
- RTE_SET_USED(sa);
-
rc = 0;
pf[0] = (struct rte_ipsec_sa_pkt_func) { 0 };
switch (ss->type) {
+ case RTE_SECURITY_ACTION_TYPE_NONE:
+ rc = lksd_none_pkt_func_select(sa, pf);
+ break;
+ case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
+ rc = inline_crypto_pkt_func_select(sa, pf);
+ break;
+ case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
+ if ((sa->type & RTE_IPSEC_SATP_DIR_MASK) ==
+ RTE_IPSEC_SATP_DIR_IB)
+ pf->process = pkt_flag_process;
+ else
+ pf->process = outb_inline_proto_process;
+ break;
+ case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
+ pf->prepare = lksd_proto_prepare;
+ pf->process = pkt_flag_process;
+ break;
default:
rc = -ENOTSUP;
}
git.droids-corp.org / dpdk.git / blobdiff