From 8b25d1ad5d2264bdfc2818c7bda74ee2697df6db Mon Sep 17 00:00:00 2001 From: Christian Ehrhardt Date: Wed, 6 Jul 2016 09:22:35 +0200 Subject: Imported Upstream version 16.07-rc1 Change-Id: I40a523e52f12e8496fdd69e902824b0226c303de Signed-off-by: Christian Ehrhardt --- examples/ipsec-secgw/esp.c | 248 ++++++++++++++++++++++++++++++--------------- 1 file changed, 167 insertions(+), 81 deletions(-) (limited to 'examples/ipsec-secgw/esp.c') diff --git a/examples/ipsec-secgw/esp.c b/examples/ipsec-secgw/esp.c index 19273807..05caa77a 100644 --- a/examples/ipsec-secgw/esp.c +++ b/examples/ipsec-secgw/esp.c @@ -37,11 +37,11 @@ #include #include #include +#include #include #include #include -#include #include #include #include @@ -50,15 +50,13 @@ #include "esp.h" #include "ipip.h" -#define IP_ESP_HDR_SZ (sizeof(struct ip) + sizeof(struct esp_hdr)) - static inline void random_iv_u64(uint64_t *buf, uint16_t n) { - unsigned left = n & 0x7; - unsigned i; + uint32_t left = n & 0x7; + uint32_t i; - IPSEC_ASSERT((n & 0x3) == 0); + RTE_ASSERT((n & 0x3) == 0); for (i = 0; i < (n >> 3); i++) buf[i] = rte_rand(); @@ -67,23 +65,35 @@ random_iv_u64(uint64_t *buf, uint16_t n) *((uint32_t *)&buf[i]) = (uint32_t)lrand48(); } -/* IPv4 Tunnel */ int -esp4_tunnel_inbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, +esp_inbound(struct rte_mbuf *m, struct ipsec_sa *sa, struct rte_crypto_op *cop) { - int32_t payload_len; + struct ip *ip4; struct rte_crypto_sym_op *sym_cop; + int32_t payload_len, ip_hdr_len; + + RTE_ASSERT(m != NULL); + RTE_ASSERT(sa != NULL); + RTE_ASSERT(cop != NULL); + + ip4 = rte_pktmbuf_mtod(m, struct ip *); + if (likely(ip4->ip_v == IPVERSION)) + ip_hdr_len = ip4->ip_hl * 4; + else if (ip4->ip_v == IP6_VERSION) + /* XXX No option headers supported */ + ip_hdr_len = sizeof(struct ip6_hdr); + else { + RTE_LOG(ERR, IPSEC_ESP, "invalid IP packet type %d\n", + ip4->ip_v); + return -EINVAL; + } - IPSEC_ASSERT(m != NULL); - IPSEC_ASSERT(sa != NULL); - IPSEC_ASSERT(cop != NULL); - - payload_len = rte_pktmbuf_pkt_len(m) - IP_ESP_HDR_SZ - sa->iv_len - - sa->digest_len; + payload_len = rte_pktmbuf_pkt_len(m) - ip_hdr_len - + sizeof(struct esp_hdr) - sa->iv_len - sa->digest_len; if ((payload_len & (sa->block_size - 1)) || (payload_len <= 0)) { - IPSEC_LOG(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n", + RTE_LOG(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n", payload_len, sa->block_size); return -EINVAL; } @@ -91,21 +101,19 @@ esp4_tunnel_inbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, sym_cop = (struct rte_crypto_sym_op *)(cop + 1); sym_cop->m_src = m; - sym_cop->cipher.data.offset = IP_ESP_HDR_SZ + sa->iv_len; + sym_cop->cipher.data.offset = ip_hdr_len + sizeof(struct esp_hdr) + + sa->iv_len; sym_cop->cipher.data.length = payload_len; sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(m, void*, - IP_ESP_HDR_SZ); + ip_hdr_len + sizeof(struct esp_hdr)); sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m, - IP_ESP_HDR_SZ); + ip_hdr_len + sizeof(struct esp_hdr)); sym_cop->cipher.iv.length = sa->iv_len; - sym_cop->auth.data.offset = sizeof(struct ip); - if (sa->auth_algo == RTE_CRYPTO_AUTH_AES_GCM) - sym_cop->auth.data.length = sizeof(struct esp_hdr); - else - sym_cop->auth.data.length = sizeof(struct esp_hdr) + - sa->iv_len + payload_len; + sym_cop->auth.data.offset = ip_hdr_len; + sym_cop->auth.data.length = sizeof(struct esp_hdr) + + sa->iv_len + payload_len; sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, void*, rte_pktmbuf_pkt_len(m) - sa->digest_len); @@ -117,19 +125,21 @@ esp4_tunnel_inbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, } int -esp4_tunnel_inbound_post_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, +esp_inbound_post(struct rte_mbuf *m, struct ipsec_sa *sa, struct rte_crypto_op *cop) { + struct ip *ip4, *ip; + struct ip6_hdr *ip6; uint8_t *nexthdr, *pad_len; uint8_t *padding; uint16_t i; - IPSEC_ASSERT(m != NULL); - IPSEC_ASSERT(sa != NULL); - IPSEC_ASSERT(cop != NULL); + RTE_ASSERT(m != NULL); + RTE_ASSERT(sa != NULL); + RTE_ASSERT(cop != NULL); if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) { - IPSEC_LOG(ERR, IPSEC_ESP, "Failed crypto op\n"); + RTE_LOG(ERR, IPSEC_ESP, "failed crypto op\n"); return -1; } @@ -139,111 +149,187 @@ esp4_tunnel_inbound_post_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, padding = pad_len - *pad_len; for (i = 0; i < *pad_len; i++) { - if (padding[i] != i) { - IPSEC_LOG(ERR, IPSEC_ESP, "invalid pad_len field\n"); + if (padding[i] != i + 1) { + RTE_LOG(ERR, IPSEC_ESP, "invalid padding\n"); return -EINVAL; } } if (rte_pktmbuf_trim(m, *pad_len + 2 + sa->digest_len)) { - IPSEC_LOG(ERR, IPSEC_ESP, + RTE_LOG(ERR, IPSEC_ESP, "failed to remove pad_len + digest\n"); return -EINVAL; } - return ip4ip_inbound(m, sizeof(struct esp_hdr) + sa->iv_len); + if (unlikely(sa->flags == TRANSPORT)) { + ip = rte_pktmbuf_mtod(m, struct ip *); + ip4 = (struct ip *)rte_pktmbuf_adj(m, + sizeof(struct esp_hdr) + sa->iv_len); + if (likely(ip->ip_v == IPVERSION)) { + memmove(ip4, ip, ip->ip_hl * 4); + ip4->ip_p = *nexthdr; + ip4->ip_len = htons(rte_pktmbuf_data_len(m)); + } else { + ip6 = (struct ip6_hdr *)ip4; + /* XXX No option headers supported */ + memmove(ip6, ip, sizeof(struct ip6_hdr)); + ip6->ip6_nxt = *nexthdr; + ip6->ip6_plen = htons(rte_pktmbuf_data_len(m)); + } + } else + ipip_inbound(m, sizeof(struct esp_hdr) + sa->iv_len); + + return 0; } int -esp4_tunnel_outbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa, +esp_outbound(struct rte_mbuf *m, struct ipsec_sa *sa, struct rte_crypto_op *cop) { - uint16_t pad_payload_len, pad_len; - struct ip *ip; - struct esp_hdr *esp; - int i; - char *padding; + struct ip *ip4; + struct ip6_hdr *ip6; + struct esp_hdr *esp = NULL; + uint8_t *padding, *new_ip, nlp; struct rte_crypto_sym_op *sym_cop; + int32_t i; + uint16_t pad_payload_len, pad_len, ip_hdr_len; + + RTE_ASSERT(m != NULL); + RTE_ASSERT(sa != NULL); + RTE_ASSERT(cop != NULL); + + ip_hdr_len = 0; + + ip4 = rte_pktmbuf_mtod(m, struct ip *); + if (likely(ip4->ip_v == IPVERSION)) { + if (unlikely(sa->flags == TRANSPORT)) { + ip_hdr_len = ip4->ip_hl * 4; + nlp = ip4->ip_p; + } else + nlp = IPPROTO_IPIP; + } else if (ip4->ip_v == IP6_VERSION) { + if (unlikely(sa->flags == TRANSPORT)) { + /* XXX No option headers supported */ + ip_hdr_len = sizeof(struct ip6_hdr); + ip6 = (struct ip6_hdr *)ip4; + nlp = ip6->ip6_nxt; + } else + nlp = IPPROTO_IPV6; + } else { + RTE_LOG(ERR, IPSEC_ESP, "invalid IP packet type %d\n", + ip4->ip_v); + return -EINVAL; + } - IPSEC_ASSERT(m != NULL); - IPSEC_ASSERT(sa != NULL); - IPSEC_ASSERT(cop != NULL); - - /* Payload length */ - pad_payload_len = RTE_ALIGN_CEIL(rte_pktmbuf_pkt_len(m) + 2, - sa->block_size); - pad_len = pad_payload_len - rte_pktmbuf_pkt_len(m); - - rte_prefetch0(rte_pktmbuf_mtod_offset(m, void *, - rte_pktmbuf_pkt_len(m))); + /* Padded payload length */ + pad_payload_len = RTE_ALIGN_CEIL(rte_pktmbuf_pkt_len(m) - + ip_hdr_len + 2, sa->block_size); + pad_len = pad_payload_len + ip_hdr_len - rte_pktmbuf_pkt_len(m); + + RTE_ASSERT(sa->flags == IP4_TUNNEL || sa->flags == IP6_TUNNEL || + sa->flags == TRANSPORT); + + if (likely(sa->flags == IP4_TUNNEL)) + ip_hdr_len = sizeof(struct ip); + else if (sa->flags == IP6_TUNNEL) + ip_hdr_len = sizeof(struct ip6_hdr); + else if (sa->flags != TRANSPORT) { + RTE_LOG(ERR, IPSEC_ESP, "Unsupported SA flags: 0x%x\n", + sa->flags); + return -EINVAL; + } /* Check maximum packet size */ - if (unlikely(IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len + - sa->digest_len > IP_MAXPACKET)) { - IPSEC_LOG(DEBUG, IPSEC_ESP, "ipsec packet is too big\n"); + if (unlikely(ip_hdr_len + sizeof(struct esp_hdr) + sa->iv_len + + pad_payload_len + sa->digest_len > IP_MAXPACKET)) { + RTE_LOG(ERR, IPSEC_ESP, "ipsec packet is too big\n"); return -EINVAL; } - padding = rte_pktmbuf_append(m, pad_len + sa->digest_len); - - IPSEC_ASSERT(padding != NULL); - - ip = ip4ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len, - sa->src, sa->dst); + padding = (uint8_t *)rte_pktmbuf_append(m, pad_len + sa->digest_len); + if (unlikely(padding == NULL)) { + RTE_LOG(ERR, IPSEC_ESP, "not enough mbuf trailing space\n"); + return -ENOSPC; + } + rte_prefetch0(padding); + + switch (sa->flags) { + case IP4_TUNNEL: + ip4 = ip4ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len, + &sa->src, &sa->dst); + esp = (struct esp_hdr *)(ip4 + 1); + break; + case IP6_TUNNEL: + ip6 = ip6ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len, + &sa->src, &sa->dst); + esp = (struct esp_hdr *)(ip6 + 1); + break; + case TRANSPORT: + new_ip = (uint8_t *)rte_pktmbuf_prepend(m, + sizeof(struct esp_hdr) + sa->iv_len); + memmove(new_ip, ip4, ip_hdr_len); + esp = (struct esp_hdr *)(new_ip + ip_hdr_len); + if (likely(ip4->ip_v == IPVERSION)) { + ip4 = (struct ip *)new_ip; + ip4->ip_p = IPPROTO_ESP; + ip4->ip_len = htons(rte_pktmbuf_data_len(m)); + } else { + ip6 = (struct ip6_hdr *)new_ip; + ip6->ip6_nxt = IPPROTO_ESP; + ip6->ip6_plen = htons(rte_pktmbuf_data_len(m)); + } + } - esp = (struct esp_hdr *)(ip + 1); - esp->spi = sa->spi; - esp->seq = htonl(sa->seq++); + sa->seq++; + esp->spi = rte_cpu_to_be_32(sa->spi); + esp->seq = rte_cpu_to_be_32(sa->seq); - IPSEC_LOG(DEBUG, IPSEC_ESP, "pktlen %u\n", rte_pktmbuf_pkt_len(m)); + if (sa->cipher_algo == RTE_CRYPTO_CIPHER_AES_CBC) + random_iv_u64((uint64_t *)(esp + 1), sa->iv_len); /* Fill pad_len using default sequential scheme */ for (i = 0; i < pad_len - 2; i++) padding[i] = i + 1; - padding[pad_len - 2] = pad_len - 2; - padding[pad_len - 1] = IPPROTO_IPIP; + padding[pad_len - 1] = nlp; sym_cop = (struct rte_crypto_sym_op *)(cop + 1); sym_cop->m_src = m; - sym_cop->cipher.data.offset = IP_ESP_HDR_SZ + sa->iv_len; + sym_cop->cipher.data.offset = ip_hdr_len + sizeof(struct esp_hdr) + + sa->iv_len; sym_cop->cipher.data.length = pad_payload_len; sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(m, uint8_t *, - IP_ESP_HDR_SZ); + ip_hdr_len + sizeof(struct esp_hdr)); sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m, - IP_ESP_HDR_SZ); + ip_hdr_len + sizeof(struct esp_hdr)); sym_cop->cipher.iv.length = sa->iv_len; - sym_cop->auth.data.offset = sizeof(struct ip); + sym_cop->auth.data.offset = ip_hdr_len; sym_cop->auth.data.length = sizeof(struct esp_hdr) + sa->iv_len + pad_payload_len; sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, uint8_t *, - IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len); + rte_pktmbuf_pkt_len(m) - sa->digest_len); sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(m, - IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len); + rte_pktmbuf_pkt_len(m) - sa->digest_len); sym_cop->auth.digest.length = sa->digest_len; - if (sa->cipher_algo == RTE_CRYPTO_CIPHER_AES_CBC) - random_iv_u64((uint64_t *)sym_cop->cipher.iv.data, - sym_cop->cipher.iv.length); - return 0; } int -esp4_tunnel_outbound_post_crypto(struct rte_mbuf *m __rte_unused, +esp_outbound_post(struct rte_mbuf *m __rte_unused, struct ipsec_sa *sa __rte_unused, struct rte_crypto_op *cop) { - IPSEC_ASSERT(m != NULL); - IPSEC_ASSERT(sa != NULL); - IPSEC_ASSERT(cop != NULL); + RTE_ASSERT(m != NULL); + RTE_ASSERT(sa != NULL); + RTE_ASSERT(cop != NULL); if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) { - IPSEC_LOG(ERR, IPSEC_ESP, "Failed crypto op\n"); + RTE_LOG(ERR, IPSEC_ESP, "Failed crypto op\n"); return -1; } -- cgit 1.2.3-korg