X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=lib%2Flibrte_net%2Frte_ip.h;h=5b7554ab8ac166578f1932b400a4b9e3a84e51f8;hb=109febfe58f93c5b425772563c35d4414a1a2c1c;hp=20c3ae17e1f17635b9f02e1ea1c750c125fd2b8e;hpb=4199fdea60c36f3ef0529a61896fd5ab0cc0ba1f;p=dpdk.git diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h index 20c3ae17e1..5b7554ab8a 100644 --- a/lib/librte_net/rte_ip.h +++ b/lib/librte_net/rte_ip.h @@ -78,8 +78,8 @@ */ #include +#include -#include #include #include @@ -109,6 +109,17 @@ struct ipv4_hdr { (((c) & 0xff) << 8) | \ ((d) & 0xff)) +/** Maximal IPv4 packet length (including a header) */ +#define IPV4_MAX_PKT_LEN 65535 + +/** Internet header length mask for version_ihl field */ +#define IPV4_HDR_IHL_MASK (0x0f) +/** + * Internet header length field multiplier (IHL field specifies overall header + * length in number of 4-byte words) + */ +#define IPV4_IHL_MULTIPLIER (4) + /* Fragment Offset * Flags. */ #define IPV4_HDR_DF_SHIFT 14 #define IPV4_HDR_MF_SHIFT 13 @@ -121,117 +132,6 @@ struct ipv4_hdr { #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 */ @@ -252,20 +152,25 @@ struct ipv4_hdr { ((x) >= IPV4_MIN_MCAST && (x) <= IPV4_MAX_MCAST) /**< check if IPv4 address is multicast */ /** - * Process the non-complemented checksum of a buffer. + * @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 - * The non-complemented checksum. + * sum += Sum of all words in the buffer. */ -static inline uint16_t -rte_raw_cksum(const char *buf, size_t len) +static inline uint32_t +__rte_raw_cksum(const void *buf, size_t len, uint32_t sum) { - const uint16_t *u16 = (const uint16_t *)buf; - uint32_t sum = 0; + /* workaround gcc strict-aliasing warning */ + uintptr_t ptr = (uintptr_t)buf; + typedef uint16_t __attribute__((__may_alias__)) u16_p; + const u16_p *u16 = (const u16_p *)ptr; while (len >= (sizeof(*u16) * 4)) { sum += u16[0]; @@ -285,11 +190,45 @@ rte_raw_cksum(const char *buf, size_t len) 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. * @@ -304,8 +243,8 @@ static inline uint16_t rte_ipv4_cksum(const struct ipv4_hdr *ipv4_hdr) { uint16_t cksum; - cksum = rte_raw_cksum((const char *)ipv4_hdr, sizeof(struct ipv4_hdr)); - return ((cksum == 0xffff) ? cksum : ~cksum); + cksum = rte_raw_cksum(ipv4_hdr, sizeof(struct ipv4_hdr)); + return (cksum == 0xffff) ? cksum : ~cksum; } /** @@ -348,7 +287,7 @@ rte_ipv4_phdr_cksum(const struct ipv4_hdr *ipv4_hdr, uint64_t ol_flags) (uint16_t)(rte_be_to_cpu_16(ipv4_hdr->total_length) - sizeof(struct ipv4_hdr))); } - return rte_raw_cksum((const char *)&psd_hdr, sizeof(psd_hdr)); + return rte_raw_cksum(&psd_hdr, sizeof(psd_hdr)); } /** @@ -415,15 +354,12 @@ struct ipv6_hdr { static inline uint16_t rte_ipv6_phdr_cksum(const struct ipv6_hdr *ipv6_hdr, uint64_t ol_flags) { - struct ipv6_psd_header { - uint8_t src_addr[16]; /* IP address of source host. */ - uint8_t dst_addr[16]; /* IP address of destination host. */ - uint32_t len; /* L4 length. */ - uint32_t proto; /* L4 protocol - top 3 bytes must be zero */ + uint32_t sum; + struct { + uint32_t len; /* L4 length. */ + uint32_t proto; /* L4 protocol - top 3 bytes must be zero */ } psd_hdr; - rte_memcpy(&psd_hdr.src_addr, ipv6_hdr->src_addr, - sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr)); psd_hdr.proto = (ipv6_hdr->proto << 24); if (ol_flags & PKT_TX_TCP_SEG) { psd_hdr.len = 0; @@ -431,7 +367,11 @@ rte_ipv6_phdr_cksum(const struct ipv6_hdr *ipv6_hdr, uint64_t ol_flags) psd_hdr.len = ipv6_hdr->payload_len; } - return rte_raw_cksum((const char *)&psd_hdr, sizeof(psd_hdr)); + 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); } /**