X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=examples%2Fipsec-secgw%2Fesp.c;h=e77afa0e1d0c6ed2b6efa0ebad0f75ce8dc5ca85;hb=b5350285ce6ef3c66730f5d69f442bddb40f416b;hp=2ca97ad0135dcbbe44f7a7ae87019b4afca39f07;hpb=c64278c0c18bd87242ff3fd12891a095cecdbf58;p=dpdk.git

diff --git a/examples/ipsec-secgw/esp.c b/examples/ipsec-secgw/esp.c
index 2ca97ad013..e77afa0e1d 100644
--- a/examples/ipsec-secgw/esp.c
+++ b/examples/ipsec-secgw/esp.c
@@ -37,11 +37,11 @@
 #include <sys/stat.h>
 #include <netinet/in.h>
 #include <netinet/ip.h>
+#include <netinet/ip6.h>
 #include <fcntl.h>
 #include <unistd.h>
 
 #include <rte_common.h>
-#include <rte_memcpy.h>
 #include <rte_crypto.h>
 #include <rte_cryptodev.h>
 #include <rte_random.h>
@@ -50,61 +50,96 @@
 #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;
-
-	RTE_ASSERT((n & 0x3) == 0);
-
-	for (i = 0; i < (n >> 3); i++)
-		buf[i] = rte_rand();
-
-	if (left)
-		*((uint32_t *)&buf[i]) = (uint32_t)lrand48();
-}
-
 int
 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);
 
-	payload_len = rte_pktmbuf_pkt_len(m) - IP_ESP_HDR_SZ - sa->iv_len -
-		sa->digest_len;
+	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;
+	}
+
+	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)) {
-		RTE_LOG(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n",
+		RTE_LOG_DP(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n",
 				payload_len, sa->block_size);
 		return -EINVAL;
 	}
 
-	sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
+	sym_cop = get_sym_cop(cop);
 
 	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);
-	sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
-			IP_ESP_HDR_SZ);
-	sym_cop->cipher.iv.length = sa->iv_len;
+	struct cnt_blk *icb;
+	uint8_t *aad;
+	uint8_t *iv = RTE_PTR_ADD(ip4, ip_hdr_len + sizeof(struct esp_hdr));
+
+	switch (sa->cipher_algo) {
+	case RTE_CRYPTO_CIPHER_NULL:
+	case RTE_CRYPTO_CIPHER_AES_CBC:
+		sym_cop->cipher.iv.data = iv;
+		sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				 ip_hdr_len + sizeof(struct esp_hdr));
+		sym_cop->cipher.iv.length = sa->iv_len;
+		break;
+	case RTE_CRYPTO_CIPHER_AES_CTR:
+	case RTE_CRYPTO_CIPHER_AES_GCM:
+		icb = get_cnt_blk(m);
+		icb->salt = sa->salt;
+		memcpy(&icb->iv, iv, 8);
+		icb->cnt = rte_cpu_to_be_32(1);
+		sym_cop->cipher.iv.data = (uint8_t *)icb;
+		sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			 (uint8_t *)icb - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->cipher.iv.length = 16;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported cipher algorithm %u\n",
+				sa->cipher_algo);
+		return -EINVAL;
+	}
 
-	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
+	switch (sa->auth_algo) {
+	case RTE_CRYPTO_AUTH_NULL:
+	case RTE_CRYPTO_AUTH_SHA1_HMAC:
+	case RTE_CRYPTO_AUTH_SHA256_HMAC:
+		sym_cop->auth.data.offset = ip_hdr_len;
 		sym_cop->auth.data.length = sizeof(struct esp_hdr) +
 			sa->iv_len + payload_len;
+		break;
+	case RTE_CRYPTO_AUTH_AES_GCM:
+		aad = get_aad(m);
+		memcpy(aad, iv - sizeof(struct esp_hdr), 8);
+		sym_cop->auth.aad.data = aad;
+		sym_cop->auth.aad.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				aad - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->auth.aad.length = 8;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported auth algorithm %u\n",
+				sa->auth_algo);
+		return -EINVAL;
+	}
 
 	sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, void*,
 			rte_pktmbuf_pkt_len(m) - sa->digest_len);
@@ -119,6 +154,8 @@ int
 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;
@@ -128,7 +165,7 @@ esp_inbound_post(struct rte_mbuf *m, struct ipsec_sa *sa,
 	RTE_ASSERT(cop != NULL);
 
 	if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) {
-		RTE_LOG(ERR, IPSEC_ESP, "Failed crypto op\n");
+		RTE_LOG(ERR, IPSEC_ESP, "failed crypto op\n");
 		return -1;
 	}
 
@@ -139,7 +176,7 @@ esp_inbound_post(struct rte_mbuf *m, struct ipsec_sa *sa,
 	padding = pad_len - *pad_len;
 	for (i = 0; i < *pad_len; i++) {
 		if (padding[i] != i + 1) {
-			RTE_LOG(ERR, IPSEC_ESP, "invalid pad_len field\n");
+			RTE_LOG(ERR, IPSEC_ESP, "invalid padding\n");
 			return -EINVAL;
 		}
 	}
@@ -150,85 +187,199 @@ esp_inbound_post(struct rte_mbuf *m, struct ipsec_sa *sa,
 		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
 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);
 
-	/* 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);
+	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;
+	}
 
-	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)) {
-		RTE_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);
-
-	RTE_ASSERT(padding != NULL);
+	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));
+		}
+	}
 
-	ip = ip4ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len,
-			sa->src, sa->dst);
+	sa->seq++;
+	esp->spi = rte_cpu_to_be_32(sa->spi);
+	esp->seq = rte_cpu_to_be_32((uint32_t)sa->seq);
 
-	esp = (struct esp_hdr *)(ip + 1);
-	esp->spi = sa->spi;
-	esp->seq = htonl(sa->seq++);
+	uint64_t *iv = (uint64_t *)(esp + 1);
 
-	RTE_LOG(DEBUG, IPSEC_ESP, "pktlen %u\n", rte_pktmbuf_pkt_len(m));
+	sym_cop = get_sym_cop(cop);
+	sym_cop->m_src = m;
+	switch (sa->cipher_algo) {
+	case RTE_CRYPTO_CIPHER_NULL:
+	case RTE_CRYPTO_CIPHER_AES_CBC:
+		memset(iv, 0, sa->iv_len);
+		sym_cop->cipher.data.offset = ip_hdr_len +
+			sizeof(struct esp_hdr);
+		sym_cop->cipher.data.length = pad_payload_len + sa->iv_len;
+		break;
+	case RTE_CRYPTO_CIPHER_AES_CTR:
+	case RTE_CRYPTO_CIPHER_AES_GCM:
+		*iv = sa->seq;
+		sym_cop->cipher.data.offset = ip_hdr_len +
+			sizeof(struct esp_hdr) + sa->iv_len;
+		sym_cop->cipher.data.length = pad_payload_len;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported cipher algorithm %u\n",
+				sa->cipher_algo);
+		return -EINVAL;
+	}
 
 	/* 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.length = pad_payload_len;
-
-	sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(m, uint8_t *,
-			IP_ESP_HDR_SZ);
+	struct cnt_blk *icb = get_cnt_blk(m);
+	icb->salt = sa->salt;
+	icb->iv = sa->seq;
+	icb->cnt = rte_cpu_to_be_32(1);
+	sym_cop->cipher.iv.data = (uint8_t *)icb;
 	sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
-			IP_ESP_HDR_SZ);
-	sym_cop->cipher.iv.length = sa->iv_len;
+			 (uint8_t *)icb - rte_pktmbuf_mtod(m, uint8_t *));
+	sym_cop->cipher.iv.length = 16;
 
-	sym_cop->auth.data.offset = sizeof(struct ip);
-	sym_cop->auth.data.length = sizeof(struct esp_hdr) + sa->iv_len +
-		pad_payload_len;
+	uint8_t *aad;
+
+	switch (sa->auth_algo) {
+	case RTE_CRYPTO_AUTH_NULL:
+	case RTE_CRYPTO_AUTH_SHA1_HMAC:
+	case RTE_CRYPTO_AUTH_SHA256_HMAC:
+		sym_cop->auth.data.offset = ip_hdr_len;
+		sym_cop->auth.data.length = sizeof(struct esp_hdr) +
+			sa->iv_len + pad_payload_len;
+		break;
+	case RTE_CRYPTO_AUTH_AES_GCM:
+		aad = get_aad(m);
+		memcpy(aad, esp, 8);
+		sym_cop->auth.aad.data = aad;
+		sym_cop->auth.aad.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				aad - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->auth.aad.length = 8;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported auth algorithm %u\n",
+				sa->auth_algo);
+		return -EINVAL;
+	}
 
 	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;
 }