X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fpackets.h;h=f294d847e578373336b99341a2ccd6146ef2a2ff;hb=HEAD;hp=5f9be01e415fdc243fdc6bf41f708a7a86baac98;hpb=038341d1c1c33107a7f2ad06a5acb47c5fff7967;p=sliver-openvswitch.git diff --git a/lib/packets.h b/lib/packets.h index 5f9be01e4..f294d847e 100644 --- a/lib/packets.h +++ b/lib/packets.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc. + * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -25,11 +25,45 @@ #include "compiler.h" #include "openvswitch/types.h" #include "random.h" +#include "hash.h" #include "util.h" struct ofpbuf; struct ds; -struct flow; + +/* Tunnel information used in flow key and metadata. */ +struct flow_tnl { + ovs_be64 tun_id; + ovs_be32 ip_src; + ovs_be32 ip_dst; + uint16_t flags; + uint8_t ip_tos; + uint8_t ip_ttl; +}; + +/* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port + * numbers and other times datapath (dpif) port numbers. This union allows + * access to both. */ +union flow_in_port { + odp_port_t odp_port; + ofp_port_t ofp_port; +}; + +/* Datapath packet metadata */ +struct pkt_metadata { + uint32_t recirc_id; /* Recirculation id carried with the + recirculating packets. 0 for packets + received from the wire. */ + uint32_t dp_hash; /* hash value computed by the recirculation + action. */ + struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */ + uint32_t skb_priority; /* Packet priority for QoS. */ + uint32_t pkt_mark; /* Packet mark. */ + union flow_in_port in_port; /* Input port. */ +}; + +#define PKT_METADATA_INITIALIZER(PORT) \ + (struct pkt_metadata){ 0, 0, { 0, 0, 0, 0, 0, 0}, 0, 0, {(PORT)} } bool dpid_from_string(const char *s, uint64_t *dpidp); @@ -44,6 +78,9 @@ static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 }; +static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED + = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 }; + static inline bool eth_addr_is_broadcast(const uint8_t ea[6]) { return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff; @@ -100,6 +137,11 @@ static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN]) | ((uint64_t) ea[4] << 8) | ea[5]); } +static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN], + uint16_t vlan) +{ + return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea)); +} static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN]) { ea[0] = x >> 40; @@ -131,13 +173,18 @@ static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN]) /* Set the top bit to indicate random Nicira address. */ ea[3] |= 0x80; } +static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN], + const uint16_t vlan, const uint32_t basis) +{ + return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis); +} bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]); bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]); void compose_rarp(struct ofpbuf *, const uint8_t eth_src[ETH_ADDR_LEN]); -void eth_push_vlan(struct ofpbuf *, ovs_be16 tci); +void eth_push_vlan(struct ofpbuf *, ovs_be16 tpid, ovs_be16 tci); void eth_pop_vlan(struct ofpbuf *); const char *eth_from_hex(const char *hex, struct ofpbuf **packetp); @@ -147,6 +194,17 @@ void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN], const uint8_t mask[ETH_ADDR_LEN], uint8_t dst[ETH_ADDR_LEN]); +void set_mpls_lse(struct ofpbuf *, ovs_be32 label); +void push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse); +void pop_mpls(struct ofpbuf *, ovs_be16 ethtype); + +void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl); +void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc); +void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label); +void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos); +ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos, + ovs_be32 label); + /* Example: * * uint8_t mac[ETH_ADDR_LEN]; @@ -165,15 +223,14 @@ void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN], * uint8_t mac[ETH_ADDR_LEN]; * int a, b; * - * if (sscanf(string, "%d"ETH_ADDR_SCAN_FMT"%d", - * &a, ETH_ADDR_SCAN_ARGS(mac), &b) == 1 + ETH_ADDR_SCAN_COUNT + 1) { + * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d", + * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) { * ... * } */ #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8 #define ETH_ADDR_SCAN_ARGS(ea) \ &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5] -#define ETH_ADDR_SCAN_COUNT 6 #define ETH_TYPE_IP 0x0800 #define ETH_TYPE_ARP 0x0806 @@ -186,6 +243,12 @@ void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN], #define ETH_TYPE_MPLS 0x8847 #define ETH_TYPE_MPLS_MCAST 0x8848 +static inline bool eth_type_mpls(ovs_be16 eth_type) +{ + return eth_type == htons(ETH_TYPE_MPLS) || + eth_type == htons(ETH_TYPE_MPLS_MCAST); +} + /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame * lengths. */ #define ETH_TYPE_MIN 0x600 @@ -196,11 +259,12 @@ void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN], #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN) #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX) #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX) +OVS_PACKED( struct eth_header { uint8_t eth_dst[ETH_ADDR_LEN]; uint8_t eth_src[ETH_ADDR_LEN]; ovs_be16 eth_type; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header)); #define LLC_DSAP_SNAP 0xaa @@ -208,27 +272,30 @@ BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header)); #define LLC_CNTL_SNAP 3 #define LLC_HEADER_LEN 3 +OVS_PACKED( struct llc_header { uint8_t llc_dsap; uint8_t llc_ssap; uint8_t llc_cntl; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header)); #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so sizeof(SNAP_ORG_ETHERNET) == 3. */ #define SNAP_HEADER_LEN 5 +OVS_PACKED( struct snap_header { uint8_t snap_org[3]; ovs_be16 snap_type; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header)); #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN) +OVS_PACKED( struct llc_snap_header { struct llc_header llc; struct snap_header snap; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header)); #define VLAN_VID_MASK 0x0fff @@ -238,6 +305,7 @@ BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header)); #define VLAN_PCP_SHIFT 13 #define VLAN_CFI 0x1000 +#define VLAN_CFI_SHIFT 12 /* Given the vlan_tci field from an 802.1Q header, in network byte order, * returns the VLAN ID in host byte order. */ @@ -255,6 +323,14 @@ vlan_tci_to_pcp(ovs_be16 vlan_tci) return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT; } +/* Given the vlan_tci field from an 802.1Q header, in network byte order, + * returns the Canonical Format Indicator (CFI). */ +static inline int +vlan_tci_to_cfi(ovs_be16 vlan_tci) +{ + return (vlan_tci & htons(VLAN_CFI)) != 0; +} + #define VLAN_HEADER_LEN 4 struct vlan_header { ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */ @@ -263,25 +339,82 @@ struct vlan_header { BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header)); #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN) +OVS_PACKED( struct vlan_eth_header { uint8_t veth_dst[ETH_ADDR_LEN]; uint8_t veth_src[ETH_ADDR_LEN]; ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */ ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */ ovs_be16 veth_next_type; -} __attribute__((packed)); +}); BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); -/* The "(void) (ip)[0]" below has no effect on the value, since it's the first - * argument of a comma expression, but it makes sure that 'ip' is a pointer. - * This is useful since a common mistake is to pass an integer instead of a - * pointer to IP_ARGS. */ -#define IP_FMT "%"PRIu8".%"PRIu8".%"PRIu8".%"PRIu8 +/* MPLS related definitions */ +#define MPLS_TTL_MASK 0x000000ff +#define MPLS_TTL_SHIFT 0 + +#define MPLS_BOS_MASK 0x00000100 +#define MPLS_BOS_SHIFT 8 + +#define MPLS_TC_MASK 0x00000e00 +#define MPLS_TC_SHIFT 9 + +#define MPLS_LABEL_MASK 0xfffff000 +#define MPLS_LABEL_SHIFT 12 + +#define MPLS_HLEN 4 + +struct mpls_hdr { + ovs_16aligned_be32 mpls_lse; +}; +BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr)); + +/* Given a mpls label stack entry in network byte order + * return mpls label in host byte order */ +static inline uint32_t +mpls_lse_to_label(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT; +} + +/* Given a mpls label stack entry in network byte order + * return mpls tc */ +static inline uint8_t +mpls_lse_to_tc(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT; +} + +/* Given a mpls label stack entry in network byte order + * return mpls ttl */ +static inline uint8_t +mpls_lse_to_ttl(ovs_be32 mpls_lse) +{ + return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT; +} + +/* Set TTL in mpls lse. */ +static inline void +flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl) +{ + *mpls_lse &= ~htonl(MPLS_TTL_MASK); + *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT); +} + +/* Given a mpls label stack entry in network byte order + * return mpls BoS bit */ +static inline uint8_t +mpls_lse_to_bos(ovs_be32 mpls_lse) +{ + return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0; +} + +#define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32 #define IP_ARGS(ip) \ - ((void) (ip)[0], ((uint8_t *) ip)[0]), \ - ((uint8_t *) ip)[1], \ - ((uint8_t *) ip)[2], \ - ((uint8_t *) ip)[3] + ntohl(ip) >> 24, \ + (ntohl(ip) >> 16) & 0xff, \ + (ntohl(ip) >> 8) & 0xff, \ + ntohl(ip) & 0xff /* Example: * @@ -289,8 +422,7 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); * ovs_be32 ip; * int a, b; * - * if (sscanf(string, "%d"IP_SCAN_FMT"%d", - * &a, IP_SCAN_ARGS(&ip), &b) == 1 + IP_SCAN_COUNT + 1) { + * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) { * ... * } */ @@ -300,7 +432,6 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header)); &((uint8_t *) ip)[1], \ &((uint8_t *) ip)[2], \ &((uint8_t *) ip)[3] -#define IP_SCAN_COUNT 4 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N * high-order 1-bits and 32-N low-order 0-bits. */ @@ -352,8 +483,8 @@ struct ip_header { uint8_t ip_ttl; uint8_t ip_proto; ovs_be16 ip_csum; - ovs_be32 ip_src; - ovs_be32 ip_dst; + ovs_16aligned_be32 ip_src; + ovs_16aligned_be32 ip_dst; }; BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header)); @@ -371,12 +502,21 @@ struct icmp_header { ovs_be16 empty; ovs_be16 mtu; } frag; - ovs_be32 gateway; + ovs_16aligned_be32 gateway; } icmp_fields; uint8_t icmp_data[0]; }; BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header)); +#define SCTP_HEADER_LEN 12 +struct sctp_header { + ovs_be16 sctp_src; + ovs_be16 sctp_dst; + ovs_16aligned_be32 sctp_vtag; + ovs_16aligned_be32 sctp_csum; +}; +BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header)); + #define UDP_HEADER_LEN 8 struct udp_header { ovs_be16 udp_src; @@ -386,23 +526,27 @@ struct udp_header { }; BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header)); -#define TCP_FIN 0x01 -#define TCP_SYN 0x02 -#define TCP_RST 0x04 -#define TCP_PSH 0x08 -#define TCP_ACK 0x10 -#define TCP_URG 0x20 +#define TCP_FIN 0x001 +#define TCP_SYN 0x002 +#define TCP_RST 0x004 +#define TCP_PSH 0x008 +#define TCP_ACK 0x010 +#define TCP_URG 0x020 +#define TCP_ECE 0x040 +#define TCP_CWR 0x080 +#define TCP_NS 0x100 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12))) -#define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x003f) +#define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff) +#define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff)) #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12) #define TCP_HEADER_LEN 20 struct tcp_header { ovs_be16 tcp_src; ovs_be16 tcp_dst; - ovs_be32 tcp_seq; - ovs_be32 tcp_ack; + ovs_16aligned_be32 tcp_seq; + ovs_16aligned_be32 tcp_ack; ovs_be16 tcp_ctl; ovs_be16 tcp_winsz; ovs_be16 tcp_csum; @@ -427,12 +571,44 @@ struct arp_eth_header { /* Ethernet+IPv4 specific members. */ uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */ - ovs_be32 ar_spa; /* Sender protocol address. */ + ovs_16aligned_be32 ar_spa; /* Sender protocol address. */ uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */ - ovs_be32 ar_tpa; /* Target protocol address. */ -} __attribute__((packed)); + ovs_16aligned_be32 ar_tpa; /* Target protocol address. */ +}; BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header)); +/* Like struct in6_addr, but whereas that struct requires 32-bit alignment on + * most implementations, this one only requires 16-bit alignment. */ +union ovs_16aligned_in6_addr { + ovs_be16 be16[8]; + ovs_16aligned_be32 be32[4]; +}; + +/* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this + * one only requires 16-bit alignment. */ +struct ovs_16aligned_ip6_hdr { + union { + struct ovs_16aligned_ip6_hdrctl { + ovs_16aligned_be32 ip6_un1_flow; + ovs_be16 ip6_un1_plen; + uint8_t ip6_un1_nxt; + uint8_t ip6_un1_hlim; + } ip6_un1; + uint8_t ip6_un2_vfc; + } ip6_ctlun; + union ovs_16aligned_in6_addr ip6_src; + union ovs_16aligned_in6_addr ip6_dst; +}; + +/* Like struct in6_frag, but whereas that struct requires 32-bit alignment, + * this one only requires 16-bit alignment. */ +struct ovs_16aligned_ip6_frag { + uint8_t ip6f_nxt; + uint8_t ip6f_reserved; + ovs_be16 ip6f_offlg; + ovs_16aligned_be32 ip6f_ident; +}; + /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */ #define IPV6_LABEL_MASK 0x000fffff @@ -442,7 +618,7 @@ BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header)); * char ipv6_s[IPV6_SCAN_LEN + 1]; * struct in6_addr ipv6; * - * if (sscanf(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b) == 3 + * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b) * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) { * ... * } @@ -472,6 +648,12 @@ static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) { return ipv6_addr_equals(mask, &in6addr_exact); } +static inline bool dl_type_is_ip_any(ovs_be16 dl_type) +{ + return dl_type == htons(ETH_TYPE_IP) + || dl_type == htons(ETH_TYPE_IPV6); +} + void format_ipv6_addr(char *addr_str, const struct in6_addr *addr); void print_ipv6_addr(struct ds *string, const struct in6_addr *addr); void print_ipv6_masked(struct ds *string, const struct in6_addr *addr, @@ -495,8 +677,9 @@ void packet_set_ipv6(struct ofpbuf *, uint8_t proto, const ovs_be32 src[4], ovs_be32 fl, uint8_t hlmit); void packet_set_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); +void packet_set_sctp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst); -uint8_t packet_get_tcp_flags(const struct ofpbuf *, const struct flow *); -void packet_format_tcp_flags(struct ds *, uint8_t); +void packet_format_tcp_flags(struct ds *, uint16_t); +const char *packet_tcp_flag_to_string(uint32_t flag); #endif /* packets.h */