#include <stdint.h>
#include <netinet/in.h>
#include <netinet/ip.h>
+#include <netinet/ip6.h>
#include <rte_mbuf.h>
-#define IPV6_VERSION (6)
-
-static inline struct ip *
-ip4ip_outbound(struct rte_mbuf *m, uint32_t offset, uint32_t src, uint32_t dst)
+static inline void *
+ipip_outbound(struct rte_mbuf *m, uint32_t offset, uint32_t is_ipv6,
+ struct ip_addr *src, struct ip_addr *dst)
{
- struct ip *inip, *outip;
+ struct ip *inip4, *outip4;
+ struct ip6_hdr *inip6, *outip6;
+ uint8_t ds_ecn;
- inip = rte_pktmbuf_mtod(m, struct ip*);
+ inip4 = rte_pktmbuf_mtod(m, struct ip *);
- IPSEC_ASSERT(inip->ip_v == IPVERSION || inip->ip_v == IPV6_VERSION);
+ RTE_ASSERT(inip4->ip_v == IPVERSION || inip4->ip_v == IP6_VERSION);
- offset += sizeof(struct ip);
+ if (inip4->ip_v == IPVERSION) {
+ /* XXX This should be done by the forwarding engine instead */
+ inip4->ip_ttl -= 1;
+ ds_ecn = inip4->ip_tos;
+ } else {
+ inip6 = (struct ip6_hdr *)inip4;
+ /* XXX This should be done by the forwarding engine instead */
+ inip6->ip6_hops -= 1;
+ ds_ecn = ntohl(inip6->ip6_flow) >> 20;
+ }
+
+ if (is_ipv6) {
+ offset += sizeof(struct ip6_hdr);
+ outip6 = (struct ip6_hdr *)rte_pktmbuf_prepend(m, offset);
+
+ RTE_ASSERT(outip6 != NULL);
+
+ /* Per RFC4301 5.1.2.1 */
+ outip6->ip6_flow = htonl(IP6_VERSION << 28 | ds_ecn << 20);
+ outip6->ip6_plen = htons(rte_pktmbuf_data_len(m));
+
+ outip6->ip6_nxt = IPPROTO_ESP;
+ outip6->ip6_hops = IPDEFTTL;
- outip = (struct ip *)rte_pktmbuf_prepend(m, offset);
+ memcpy(&outip6->ip6_src.s6_addr, src, 16);
+ memcpy(&outip6->ip6_dst.s6_addr, dst, 16);
- IPSEC_ASSERT(outip != NULL);
+ return outip6;
+ }
+
+ offset += sizeof(struct ip);
+ outip4 = (struct ip *)rte_pktmbuf_prepend(m, offset);
+
+ RTE_ASSERT(outip4 != NULL);
/* Per RFC4301 5.1.2.1 */
- outip->ip_v = IPVERSION;
- outip->ip_hl = 5;
- outip->ip_tos = inip->ip_tos;
- outip->ip_len = htons(rte_pktmbuf_data_len(m));
+ outip4->ip_v = IPVERSION;
+ outip4->ip_hl = 5;
+ outip4->ip_tos = ds_ecn;
+ outip4->ip_len = htons(rte_pktmbuf_data_len(m));
+
+ outip4->ip_id = 0;
+ outip4->ip_off = 0;
+
+ outip4->ip_ttl = IPDEFTTL;
+ outip4->ip_p = IPPROTO_ESP;
+
+ outip4->ip_src.s_addr = src->ip4;
+ outip4->ip_dst.s_addr = dst->ip4;
- outip->ip_id = 0;
- outip->ip_off = 0;
+ return outip4;
+}
+
+static inline struct ip *
+ip4ip_outbound(struct rte_mbuf *m, uint32_t offset,
+ struct ip_addr *src, struct ip_addr *dst)
+{
+ return ipip_outbound(m, offset, 0, src, dst);
+}
- outip->ip_ttl = IPDEFTTL;
- outip->ip_p = IPPROTO_ESP;
+static inline struct ip6_hdr *
+ip6ip_outbound(struct rte_mbuf *m, uint32_t offset,
+ struct ip_addr *src, struct ip_addr *dst)
+{
+ return ipip_outbound(m, offset, 1, src, dst);
+}
- outip->ip_src.s_addr = src;
- outip->ip_dst.s_addr = dst;
+static inline void
+ip4_ecn_setup(struct ip *ip4)
+{
+ if (ip4->ip_tos & IPTOS_ECN_MASK)
+ ip4->ip_tos |= IPTOS_ECN_CE;
+}
- return outip;
+static inline void
+ip6_ecn_setup(struct ip6_hdr *ip6)
+{
+ if ((ntohl(ip6->ip6_flow) >> 20) & IPTOS_ECN_MASK)
+ ip6->ip6_flow = htonl(ntohl(ip6->ip6_flow) |
+ (IPTOS_ECN_CE << 20));
}
-static inline int
-ip4ip_inbound(struct rte_mbuf *m, uint32_t offset)
+static inline void
+ipip_inbound(struct rte_mbuf *m, uint32_t offset)
{
- struct ip *inip;
- struct ip *outip;
+ struct ip *inip4, *outip4;
+ struct ip6_hdr *inip6, *outip6;
+ uint32_t ip_len, set_ecn;
- outip = rte_pktmbuf_mtod(m, struct ip*);
+ outip4 = rte_pktmbuf_mtod(m, struct ip*);
- IPSEC_ASSERT(outip->ip_v == IPVERSION);
+ RTE_ASSERT(outip4->ip_v == IPVERSION || outip4->ip_v == IP6_VERSION);
- offset += sizeof(struct ip);
- inip = (struct ip *)rte_pktmbuf_adj(m, offset);
- IPSEC_ASSERT(inip->ip_v == IPVERSION || inip->ip_v == IPV6_VERSION);
+ if (outip4->ip_v == IPVERSION) {
+ ip_len = sizeof(struct ip);
+ set_ecn = ((outip4->ip_tos & IPTOS_ECN_CE) == IPTOS_ECN_CE);
+ } else {
+ outip6 = (struct ip6_hdr *)outip4;
+ ip_len = sizeof(struct ip6_hdr);
+ set_ecn = ntohl(outip6->ip6_flow) >> 20;
+ set_ecn = ((set_ecn & IPTOS_ECN_CE) == IPTOS_ECN_CE);
+ }
+
+ inip4 = (struct ip *)rte_pktmbuf_adj(m, offset + ip_len);
+ RTE_ASSERT(inip4->ip_v == IPVERSION || inip4->ip_v == IP6_VERSION);
/* Check packet is still bigger than IP header (inner) */
- IPSEC_ASSERT(rte_pktmbuf_pkt_len(m) > sizeof(struct ip));
+ RTE_ASSERT(rte_pktmbuf_pkt_len(m) > ip_len);
/* RFC4301 5.1.2.1 Note 6 */
- if ((inip->ip_tos & htons(IPTOS_ECN_ECT0 | IPTOS_ECN_ECT1)) &&
- ((outip->ip_tos & htons(IPTOS_ECN_CE)) == IPTOS_ECN_CE))
- inip->ip_tos |= htons(IPTOS_ECN_CE);
-
- return 0;
+ if (inip4->ip_v == IPVERSION) {
+ if (set_ecn)
+ ip4_ecn_setup(inip4);
+ /* XXX This should be done by the forwarding engine instead */
+ inip4->ip_ttl -= 1;
+ } else {
+ inip6 = (struct ip6_hdr *)inip4;
+ if (set_ecn)
+ ip6_ecn_setup(inip6);
+ /* XXX This should be done by the forwarding engine instead */
+ inip6->ip6_hops -= 1;
+ }
}
#endif /* __IPIP_H__ */
Code Review / deb_dpdk.git / blobdiff