/*-
* BSD LICENSE
- *
+ *
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * Copyright 2014 6WIND S.A.
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
- *
+ *
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*/
#include <stdint.h>
+#include <netinet/in.h>
+
+#include <rte_memcpy.h>
+#include <rte_byteorder.h>
+#include <rte_mbuf.h>
#ifdef __cplusplus
extern "C" {
#define IPV4_HDR_OFFSET_UNITS 8
-/* IPv4 protocols */
-#define IPPROTO_IP 0 /**< dummy for IP */
-#define IPPROTO_HOPOPTS 0 /**< IP6 hop-by-hop options */
-#define IPPROTO_ICMP 1 /**< control message protocol */
-#define IPPROTO_IGMP 2 /**< group mgmt protocol */
-#define IPPROTO_GGP 3 /**< gateway^2 (deprecated) */
-#define IPPROTO_IPV4 4 /**< IPv4 encapsulation */
-#define IPPROTO_TCP 6 /**< tcp */
-#define IPPROTO_ST 7 /**< Stream protocol II */
-#define IPPROTO_EGP 8 /**< exterior gateway protocol */
-#define IPPROTO_PIGP 9 /**< private interior gateway */
-#define IPPROTO_RCCMON 10 /**< BBN RCC Monitoring */
-#define IPPROTO_NVPII 11 /**< network voice protocol*/
-#define IPPROTO_PUP 12 /**< pup */
-#define IPPROTO_ARGUS 13 /**< Argus */
-#define IPPROTO_EMCON 14 /**< EMCON */
-#define IPPROTO_XNET 15 /**< Cross Net Debugger */
-#define IPPROTO_CHAOS 16 /**< Chaos*/
-#define IPPROTO_UDP 17 /**< user datagram protocol */
-#define IPPROTO_MUX 18 /**< Multiplexing */
-#define IPPROTO_MEAS 19 /**< DCN Measurement Subsystems */
-#define IPPROTO_HMP 20 /**< Host Monitoring */
-#define IPPROTO_PRM 21 /**< Packet Radio Measurement */
-#define IPPROTO_IDP 22 /**< xns idp */
-#define IPPROTO_TRUNK1 23 /**< Trunk-1 */
-#define IPPROTO_TRUNK2 24 /**< Trunk-2 */
-#define IPPROTO_LEAF1 25 /**< Leaf-1 */
-#define IPPROTO_LEAF2 26 /**< Leaf-2 */
-#define IPPROTO_RDP 27 /**< Reliable Data */
-#define IPPROTO_IRTP 28 /**< Reliable Transaction */
-#define IPPROTO_TP 29 /**< tp-4 w/ class negotiation */
-#define IPPROTO_BLT 30 /**< Bulk Data Transfer */
-#define IPPROTO_NSP 31 /**< Network Services */
-#define IPPROTO_INP 32 /**< Merit Internodal */
-#define IPPROTO_SEP 33 /**< Sequential Exchange */
-#define IPPROTO_3PC 34 /**< Third Party Connect */
-#define IPPROTO_IDPR 35 /**< InterDomain Policy Routing */
-#define IPPROTO_XTP 36 /**< XTP */
-#define IPPROTO_DDP 37 /**< Datagram Delivery */
-#define IPPROTO_CMTP 38 /**< Control Message Transport */
-#define IPPROTO_TPXX 39 /**< TP++ Transport */
-#define IPPROTO_IL 40 /**< IL transport protocol */
-#define IPPROTO_IPV6 41 /**< IP6 header */
-#define IPPROTO_SDRP 42 /**< Source Demand Routing */
-#define IPPROTO_ROUTING 43 /**< IP6 routing header */
-#define IPPROTO_FRAGMENT 44 /**< IP6 fragmentation header */
-#define IPPROTO_IDRP 45 /**< InterDomain Routing*/
-#define IPPROTO_RSVP 46 /**< resource reservation */
-#define IPPROTO_GRE 47 /**< General Routing Encap. */
-#define IPPROTO_MHRP 48 /**< Mobile Host Routing */
-#define IPPROTO_BHA 49 /**< BHA */
-#define IPPROTO_ESP 50 /**< IP6 Encap Sec. Payload */
-#define IPPROTO_AH 51 /**< IP6 Auth Header */
-#define IPPROTO_INLSP 52 /**< Integ. Net Layer Security */
-#define IPPROTO_SWIPE 53 /**< IP with encryption */
-#define IPPROTO_NHRP 54 /**< Next Hop Resolution */
-/* 55-57: Unassigned */
-#define IPPROTO_ICMPV6 58 /**< ICMP6 */
-#define IPPROTO_NONE 59 /**< IP6 no next header */
-#define IPPROTO_DSTOPTS 60 /**< IP6 destination option */
-#define IPPROTO_AHIP 61 /**< any host internal protocol */
-#define IPPROTO_CFTP 62 /**< CFTP */
-#define IPPROTO_HELLO 63 /**< "hello" routing protocol */
-#define IPPROTO_SATEXPAK 64 /**< SATNET/Backroom EXPAK */
-#define IPPROTO_KRYPTOLAN 65 /**< Kryptolan */
-#define IPPROTO_RVD 66 /**< Remote Virtual Disk */
-#define IPPROTO_IPPC 67 /**< Pluribus Packet Core */
-#define IPPROTO_ADFS 68 /**< Any distributed FS */
-#define IPPROTO_SATMON 69 /**< Satnet Monitoring */
-#define IPPROTO_VISA 70 /**< VISA Protocol */
-#define IPPROTO_IPCV 71 /**< Packet Core Utility */
-#define IPPROTO_CPNX 72 /**< Comp. Prot. Net. Executive */
-#define IPPROTO_CPHB 73 /**< Comp. Prot. HeartBeat */
-#define IPPROTO_WSN 74 /**< Wang Span Network */
-#define IPPROTO_PVP 75 /**< Packet Video Protocol */
-#define IPPROTO_BRSATMON 76 /**< BackRoom SATNET Monitoring */
-#define IPPROTO_ND 77 /**< Sun net disk proto (temp.) */
-#define IPPROTO_WBMON 78 /**< WIDEBAND Monitoring */
-#define IPPROTO_WBEXPAK 79 /**< WIDEBAND EXPAK */
-#define IPPROTO_EON 80 /**< ISO cnlp */
-#define IPPROTO_VMTP 81 /**< VMTP */
-#define IPPROTO_SVMTP 82 /**< Secure VMTP */
-#define IPPROTO_VINES 83 /**< Banyon VINES */
-#define IPPROTO_TTP 84 /**< TTP */
-#define IPPROTO_IGP 85 /**< NSFNET-IGP */
-#define IPPROTO_DGP 86 /**< dissimilar gateway prot. */
-#define IPPROTO_TCF 87 /**< TCF */
-#define IPPROTO_IGRP 88 /**< Cisco/GXS IGRP */
-#define IPPROTO_OSPFIGP 89 /**< OSPFIGP */
-#define IPPROTO_SRPC 90 /**< Strite RPC protocol */
-#define IPPROTO_LARP 91 /**< Locus Address Resoloution */
-#define IPPROTO_MTP 92 /**< Multicast Transport */
-#define IPPROTO_AX25 93 /**< AX.25 Frames */
-#define IPPROTO_IPEIP 94 /**< IP encapsulated in IP */
-#define IPPROTO_MICP 95 /**< Mobile Int.ing control */
-#define IPPROTO_SCCSP 96 /**< Semaphore Comm. security */
-#define IPPROTO_ETHERIP 97 /**< Ethernet IP encapsulation */
-#define IPPROTO_ENCAP 98 /**< encapsulation header */
-#define IPPROTO_APES 99 /**< any private encr. scheme */
-#define IPPROTO_GMTP 100 /**< GMTP */
-#define IPPROTO_IPCOMP 108 /**< payload compression (IPComp) */
-/* 101-254: Partly Unassigned */
-#define IPPROTO_PIM 103 /**< Protocol Independent Mcast */
-#define IPPROTO_PGM 113 /**< PGM */
-#define IPPROTO_SCTP 132 /**< Stream Control Transport Protocol */
-/* 255: Reserved */
-/* BSD Private, local use, namespace incursion */
-#define IPPROTO_DIVERT 254 /**< divert pseudo-protocol */
-#define IPPROTO_RAW 255 /**< raw IP packet */
-#define IPPROTO_MAX 256 /**< maximum protocol number */
-
/*
* IPv4 address types
*/
#define IS_IPV4_MCAST(x) \
((x) >= IPV4_MIN_MCAST && (x) <= IPV4_MAX_MCAST) /**< check if IPv4 address is multicast */
+/**
+ * @internal Calculate a sum of all words in the buffer.
+ * Helper routine for the rte_raw_cksum().
+ *
+ * @param buf
+ * Pointer to the buffer.
+ * @param len
+ * Length of the buffer.
+ * @param sum
+ * Initial value of the sum.
+ * @return
+ * sum += Sum of all words in the buffer.
+ */
+static inline uint32_t
+__rte_raw_cksum(const void *buf, size_t len, uint32_t sum)
+{
+ /* workaround gcc strict-aliasing warning */
+ uintptr_t ptr = (uintptr_t)buf;
+ const uint16_t *u16 = (const uint16_t *)ptr;
+
+ while (len >= (sizeof(*u16) * 4)) {
+ sum += u16[0];
+ sum += u16[1];
+ sum += u16[2];
+ sum += u16[3];
+ len -= sizeof(*u16) * 4;
+ u16 += 4;
+ }
+ while (len >= sizeof(*u16)) {
+ sum += *u16;
+ len -= sizeof(*u16);
+ u16 += 1;
+ }
+
+ /* if length is in odd bytes */
+ if (len == 1)
+ sum += *((const uint8_t *)u16);
+
+ return sum;
+}
+
+/**
+ * @internal Reduce a sum to the non-complemented checksum.
+ * Helper routine for the rte_raw_cksum().
+ *
+ * @param sum
+ * Value of the sum.
+ * @return
+ * The non-complemented checksum.
+ */
+static inline uint16_t
+__rte_raw_cksum_reduce(uint32_t sum)
+{
+ sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
+ sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
+ return (uint16_t)sum;
+}
+
+/**
+ * Process the non-complemented checksum of a buffer.
+ *
+ * @param buf
+ * Pointer to the buffer.
+ * @param len
+ * Length of the buffer.
+ * @return
+ * The non-complemented checksum.
+ */
+static inline uint16_t
+rte_raw_cksum(const void *buf, size_t len)
+{
+ uint32_t sum;
+
+ sum = __rte_raw_cksum(buf, len, 0);
+ return __rte_raw_cksum_reduce(sum);
+}
+
+/**
+ * Process the IPv4 checksum of an IPv4 header.
+ *
+ * The checksum field must be set to 0 by the caller.
+ *
+ * @param ipv4_hdr
+ * The pointer to the contiguous IPv4 header.
+ * @return
+ * The complemented checksum to set in the IP packet.
+ */
+static inline uint16_t
+rte_ipv4_cksum(const struct ipv4_hdr *ipv4_hdr)
+{
+ uint16_t cksum;
+ cksum = rte_raw_cksum(ipv4_hdr, sizeof(struct ipv4_hdr));
+ return ((cksum == 0xffff) ? cksum : ~cksum);
+}
+
+/**
+ * Process the pseudo-header checksum of an IPv4 header.
+ *
+ * The checksum field must be set to 0 by the caller.
+ *
+ * Depending on the ol_flags, the pseudo-header checksum expected by the
+ * drivers is not the same. For instance, when TSO is enabled, the IP
+ * payload length must not be included in the packet.
+ *
+ * When ol_flags is 0, it computes the standard pseudo-header checksum.
+ *
+ * @param ipv4_hdr
+ * The pointer to the contiguous IPv4 header.
+ * @param ol_flags
+ * The ol_flags of the associated mbuf.
+ * @return
+ * The non-complemented checksum to set in the L4 header.
+ */
+static inline uint16_t
+rte_ipv4_phdr_cksum(const struct ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
+{
+ struct ipv4_psd_header {
+ uint32_t src_addr; /* IP address of source host. */
+ uint32_t dst_addr; /* IP address of destination host. */
+ uint8_t zero; /* zero. */
+ uint8_t proto; /* L4 protocol type. */
+ uint16_t len; /* L4 length. */
+ } psd_hdr;
+
+ psd_hdr.src_addr = ipv4_hdr->src_addr;
+ psd_hdr.dst_addr = ipv4_hdr->dst_addr;
+ psd_hdr.zero = 0;
+ psd_hdr.proto = ipv4_hdr->next_proto_id;
+ if (ol_flags & PKT_TX_TCP_SEG) {
+ psd_hdr.len = 0;
+ } else {
+ psd_hdr.len = rte_cpu_to_be_16(
+ (uint16_t)(rte_be_to_cpu_16(ipv4_hdr->total_length)
+ - sizeof(struct ipv4_hdr)));
+ }
+ return rte_raw_cksum(&psd_hdr, sizeof(psd_hdr));
+}
+
+/**
+ * Process the IPv4 UDP or TCP checksum.
+ *
+ * The IPv4 header should not contains options. The IP and layer 4
+ * checksum must be set to 0 in the packet by the caller.
+ *
+ * @param ipv4_hdr
+ * The pointer to the contiguous IPv4 header.
+ * @param l4_hdr
+ * The pointer to the beginning of the L4 header.
+ * @return
+ * The complemented checksum to set in the IP packet.
+ */
+static inline uint16_t
+rte_ipv4_udptcp_cksum(const struct ipv4_hdr *ipv4_hdr, const void *l4_hdr)
+{
+ uint32_t cksum;
+ uint32_t l4_len;
+
+ l4_len = rte_be_to_cpu_16(ipv4_hdr->total_length) -
+ sizeof(struct ipv4_hdr);
+
+ cksum = rte_raw_cksum(l4_hdr, l4_len);
+ cksum += rte_ipv4_phdr_cksum(ipv4_hdr, 0);
+
+ cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
+ cksum = (~cksum) & 0xffff;
+ if (cksum == 0)
+ cksum = 0xffff;
+
+ return cksum;
+}
+
/**
* IPv6 Header
*/
uint8_t dst_addr[16]; /**< IP address of destination host(s). */
} __attribute__((__packed__));
+/**
+ * Process the pseudo-header checksum of an IPv6 header.
+ *
+ * Depending on the ol_flags, the pseudo-header checksum expected by the
+ * drivers is not the same. For instance, when TSO is enabled, the IPv6
+ * payload length must not be included in the packet.
+ *
+ * When ol_flags is 0, it computes the standard pseudo-header checksum.
+ *
+ * @param ipv6_hdr
+ * The pointer to the contiguous IPv6 header.
+ * @param ol_flags
+ * The ol_flags of the associated mbuf.
+ * @return
+ * The non-complemented checksum to set in the L4 header.
+ */
+static inline uint16_t
+rte_ipv6_phdr_cksum(const struct ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
+{
+ uint32_t sum;
+ struct {
+ uint32_t len; /* L4 length. */
+ uint32_t proto; /* L4 protocol - top 3 bytes must be zero */
+ } psd_hdr;
+
+ psd_hdr.proto = (ipv6_hdr->proto << 24);
+ if (ol_flags & PKT_TX_TCP_SEG) {
+ psd_hdr.len = 0;
+ } else {
+ psd_hdr.len = ipv6_hdr->payload_len;
+ }
+
+ sum = __rte_raw_cksum(ipv6_hdr->src_addr,
+ sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr),
+ 0);
+ sum = __rte_raw_cksum(&psd_hdr, sizeof(psd_hdr), sum);
+ return __rte_raw_cksum_reduce(sum);
+}
+
+/**
+ * Process the IPv6 UDP or TCP checksum.
+ *
+ * The IPv4 header should not contains options. The layer 4 checksum
+ * must be set to 0 in the packet by the caller.
+ *
+ * @param ipv6_hdr
+ * The pointer to the contiguous IPv6 header.
+ * @param l4_hdr
+ * The pointer to the beginning of the L4 header.
+ * @return
+ * The complemented checksum to set in the IP packet.
+ */
+static inline uint16_t
+rte_ipv6_udptcp_cksum(const struct ipv6_hdr *ipv6_hdr, const void *l4_hdr)
+{
+ uint32_t cksum;
+ uint32_t l4_len;
+
+ l4_len = rte_be_to_cpu_16(ipv6_hdr->payload_len);
+
+ cksum = rte_raw_cksum(l4_hdr, l4_len);
+ cksum += rte_ipv6_phdr_cksum(ipv6_hdr, 0);
+
+ cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
+ cksum = (~cksum) & 0xffff;
+ if (cksum == 0)
+ cksum = 0xffff;
+
+ return cksum;
+}
+
#ifdef __cplusplus
}
#endif
git.droids-corp.org / dpdk.git / blobdiff